network/squid: Updated for version 3.1.6.

Signed-off-by: Michiel van Wessem <michiel@slackbuilds.org>

1 files changed, 1729 insertions, 812 deletions

diff --git a/network/squid/squid.conf b/network/squid/squid.conf
index 28b2fc0c75980..a7b65c8292a16 100644
--- a/network/squid/squid.conf
+++ b/network/squid/squid.conf
@@ -1,5 +1,4 @@
-
-#	WELCOME TO SQUID 3.0.STABLE1
+#	WELCOME TO SQUID 3.1.6
 #	----------------------------
 #
 #	This is the default Squid configuration file. You may wish
@@ -15,6 +14,18 @@
 #	case.
 #
 
+#  Configuration options can be included using the "include" directive.
+#  Include takes a list of files to include. Quoting and wildcards is
+#  supported.
+#
+#  For example,
+#
+#  include /path/to/included/file/squid.acl.config
+#
+#  Includes can be nested up to a hard-coded depth of 16 levels.
+#  This arbitrary restriction is to prevent recursive include references
+#  from causing Squid entering an infinite loop whilst trying to load
+#  configuration files.
 
 # OPTIONS FOR AUTHENTICATION
 # -----------------------------------------------------------------------------
@@ -54,6 +65,8 @@
 #	proxy as the client then thinks it is talking to an origin server and
 #	not the proxy. This is a limitation of bending the TCP/IP protocol to
 #	transparently intercepting port 80, not a limitation in Squid.
+#	Ports flagged 'transparent', 'intercept', or 'tproxy' have
+#	authentication disabled.
 #
 #	=== Parameters for the basic scheme follow. ===
 #
@@ -62,7 +75,8 @@
 #	reads a line containing "username password" and replies "OK" or
 #	"ERR" in an endless loop. "ERR" responses may optionally be followed
 #	by a error description available as %m in the returned error page.
-#	If you use an authenticator, make sure you have 1 acl of type proxy_auth.
+#	If you use an authenticator, make sure you have 1 acl of type
+#	proxy_auth.
 #
 #	By default, the basic authentication scheme is not used unless a
 #	program is specified.
@@ -72,6 +86,12 @@
 #
 #	auth_param basic program /usr/libexec/ncsa_auth /usr/etc/passwd
 #
+#	"utf8" on|off
+#	HTTP uses iso-latin-1 as characterset, while some authentication
+#	backends such as LDAP expects UTF-8. If this is set to on Squid will
+#	translate the HTTP iso-latin-1 charset to UTF-8 before sending the
+#	username & password to the helper.
+#
 #	"children" numberofchildren
 #	The number of authenticator processes to spawn. If you start too few
 #	Squid will have to wait for them to process a backlog of credential
@@ -132,7 +152,13 @@
 #	If you want to use a digest authenticator, set this line to
 #	something like
 #
-#	auth_param digest program /usr/bin/digest_auth_pw /usr/etc/digpass
+#	auth_param digest program /usr/bin/digest_pw_auth /usr/etc/digpass
+#
+#	"utf8" on|off
+#	HTTP uses iso-latin-1 as characterset, while some authentication
+#	backends such as LDAP expects UTF-8. If this is set to on Squid will
+#	translate the HTTP iso-latin-1 charset to UTF-8 before sending the
+#	username & password to the helper.
 #
 #	"children" numberofchildren
 #	The number of authenticator processes to spawn (no default).
@@ -217,9 +243,9 @@
 #	the Microsoft Internet Explorer or Mozilla Firefox browsers.
 #	Its main purpose is to exchange credentials with the Squid proxy
 #	using the Kerberos mechanisms.
-#	If you use a Negotiate authenticator, make sure you have at least one acl
-#	of type proxy_auth active.  By default, the negotiate authenticator_program
-#	is not used.
+#	If you use a Negotiate authenticator, make sure you have at least
+#	one acl of type proxy_auth active. By default, the negotiate
+#	authenticator_program is not used.
 #	The only supported program for this role is the ntlm_auth
 #	program distributed as part of Samba, version 4 or later.
 #
@@ -243,30 +269,37 @@
 #
 #	auth_param negotiate keep_alive on
 #
-#Recommended minimum configuration per scheme:
-#auth_param negotiate program <uncomment and complete this line to activate>
-#auth_param negotiate children 5
-#auth_param negotiate keep_alive on
-#auth_param ntlm program <uncomment and complete this line to activate>
-#auth_param ntlm children 5
-#auth_param ntlm keep_alive on
-#auth_param digest program <uncomment and complete this line>
-#auth_param digest children 5
-#auth_param digest realm Squid proxy-caching web server
-#auth_param digest nonce_garbage_interval 5 minutes
-#auth_param digest nonce_max_duration 30 minutes
-#auth_param digest nonce_max_count 50
-#auth_param basic program <uncomment and complete this line>
-#auth_param basic children 5
-#auth_param basic realm Squid proxy-caching web server
-#auth_param basic credentialsttl 2 hours
+#	
+#	Examples:
+#
+##Recommended minimum configuration per scheme:
+##auth_param negotiate program <uncomment and complete this line to activate>
+##auth_param negotiate children 5
+##auth_param negotiate keep_alive on
+##
+##auth_param ntlm program <uncomment and complete this line to activate>
+##auth_param ntlm children 5
+##auth_param ntlm keep_alive on
+##
+##auth_param digest program <uncomment and complete this line>
+##auth_param digest children 5
+##auth_param digest realm Squid proxy-caching web server
+##auth_param digest nonce_garbage_interval 5 minutes
+##auth_param digest nonce_max_duration 30 minutes
+##auth_param digest nonce_max_count 50
+##
+##auth_param basic program <uncomment and complete this line>
+##auth_param basic children 5
+##auth_param basic realm Squid proxy-caching web server
+##auth_param basic credentialsttl 2 hours
+#Default:
+# none
 
 #  TAG: authenticate_cache_garbage_interval
 #	The time period between garbage collection across the username cache.
 #	This is a tradeoff between memory utilization (long intervals - say
 #	2 days) and CPU (short intervals - say 1 minute). Only change if you
 #	have good reason to.
-#
 #Default:
 # authenticate_cache_garbage_interval 1 hour
 
@@ -275,7 +308,6 @@
 #	user cache since their last request. When the garbage
 #	interval passes, all user credentials that have passed their
 #	TTL are removed from memory.
-#
 #Default:
 # authenticate_ttl 1 hour
 
@@ -287,11 +319,9 @@
 #	quickly, as is the case with dialups.   You might be safe
 #	using a larger value (e.g., 2 hours) in a corporate LAN
 #	environment with relatively static address assignments.
-#
 #Default:
 # authenticate_ip_ttl 0 seconds
 
-
 # ACCESS CONTROLS
 # -----------------------------------------------------------------------------
 
@@ -317,6 +347,9 @@
 #			cached entry should be initiated without needing to
 #			wait for a new reply. (default 0 for no grace period)
 #	  protocol=2.5	Compatibility mode for Squid-2.5 external acl helpers
+#	  ipv4 / ipv6	IP-mode used to communicate to this helper.
+#			For compatability with older configurations and helpers
+#			the default is currently 'ipv4'.
 #
 #	FORMAT specifications
 #
@@ -338,13 +371,23 @@
 #	  %USER_CERTCHAIN SSL User certificate chain in PEM format
 #	  %USER_CERT_xx	SSL User certificate subject attribute xx
 #	  %USER_CA_xx	SSL User certificate issuer attribute xx
-#	  %{Header}	HTTP request header
-#	  %{Hdr:member}	HTTP request header list member
-#	  %{Hdr:;member}
+#
+#	  %>{Header}	HTTP request header "Header"
+#	  %>{Hdr:member}
+#	  		HTTP request header "Hdr" list member "member"
+#	  %>{Hdr:;member}
 #	  		HTTP request header list member using ; as
 #	  		list separator. ; can be any non-alphanumeric
 #			character.
 #
+#	  %<{Header}	HTTP reply header "Header"
+#	  %<{Hdr:member}
+#	  		HTTP reply header "Hdr" list member "member"
+#	  %<{Hdr:;member}
+#	  		HTTP reply header list member using ; as
+#	  		list separator. ; can be any non-alphanumeric
+#			character.
+#
 #	In addition to the above, any string specified in the referencing
 #	acl will also be included in the helper request line, after the
 #	specified formats (see the "acl external" directive)
@@ -379,75 +422,65 @@
 #	When using the concurrency= option the protocol is changed by
 #	introducing a query channel tag infront of the request/response.
 #	The query channel tag is a number between 0 and concurrency-1.
-#
 #Default:
 # none
 
 #  TAG: acl
 #	Defining an Access List
 #
-#	acl aclname acltype string1 ...
-#	acl aclname acltype "file" ...
+#	Every access list definition must begin with an aclname and acltype, 
+#	followed by either type-specific arguments or a quoted filename that
+#	they are read from.
 #
-#	when using "file", the file should contain one item per line
+#	   acl aclname acltype argument ...
+#	   acl aclname acltype "file" ...
 #
-#	acltype is one of the types described below
+#	When using "file", the file should contain one item per line.
 #
 #	By default, regular expressions are CASE-SENSITIVE.  To make
 #	them case-insensitive, use the -i option.
 #
-#	acl aclname src      ip-address/netmask ... (clients IP address)
-#	acl aclname src      addr1-addr2/netmask ... (range of addresses)
-#	acl aclname dst      ip-address/netmask ... (URL host's IP address)
-#	acl aclname myip     ip-address/netmask ... (local socket IP address)
+#	Some acl types require suspending the current request in order
+#	to access some external data source.
+#	Those which do are marked with the tag [slow], those which
+#	don't are marked as [fast].
+#	See http://wiki.squid-cache.org/SquidFaq/SquidAcl
+#	for further information
+#
+#	***** ACL TYPES AVAILABLE *****
+#
+#	acl aclname src ip-address/netmask ...	# clients IP address [fast]
+#	acl aclname src addr1-addr2/netmask ...	# range of addresses [fast]
+#	acl aclname dst ip-address/netmask ...	# URL host's IP address [slow]
+#	acl aclname myip ip-address/netmask ...	# local socket IP address [fast]
 #
 #	acl aclname arp      mac-address ... (xx:xx:xx:xx:xx:xx notation)
 #	  # The arp ACL requires the special configure option --enable-arp-acl.
 #	  # Furthermore, the ARP ACL code is not portable to all operating systems.
-#	  # It works on Linux, Solaris, Windows, FreeBSD, and some other *BSD variants.
+#	  # It works on Linux, Solaris, Windows, FreeBSD, and some
+#	  # other *BSD variants.
+#	  # [fast]
 #	  #
 #	  # NOTE: Squid can only determine the MAC address for clients that are on
-#	  # the same subnet. If the client is on a different subnet, then Squid cannot
-#	  # find out its MAC address.
-#
-#	acl aclname srcdomain   .foo.com ...    # reverse lookup, client IP
-#	acl aclname dstdomain   .foo.com ...    # Destination server from URL
-#	acl aclname srcdom_regex [-i] xxx ...   # regex matching client name
-#	acl aclname dstdom_regex [-i] xxx ...   # regex matching server
+#	  # the same subnet. If the client is on a different subnet,
+#	  # then Squid cannot find out its MAC address.
+#
+#	acl aclname srcdomain   .foo.com ...
+#	  # reverse lookup, from client IP [slow]
+#	acl aclname dstdomain   .foo.com ...
+#	  # Destination server from URL [fast]
+#	acl aclname srcdom_regex [-i] \.foo\.com ...
+#	  # regex matching client name [slow]
+#	acl aclname dstdom_regex [-i] \.foo\.com ...
+#	  # regex matching server [fast]
+#	  #
 #	  # For dstdomain and dstdom_regex a reverse lookup is tried if a IP
 #	  # based URL is used and no match is found. The name "none" is used
 #	  # if the reverse lookup fails.
 #
-#	acl aclname http_status 200 301 500- 400-403 ...     # status code in reply
-#
-#	acl aclname time     [day-abbrevs]  [h1:m1-h2:m2]
-#	    day-abbrevs:
-#		S - Sunday
-#		M - Monday
-#		T - Tuesday
-#		W - Wednesday
-#		H - Thursday
-#		F - Friday
-#		A - Saturday
-#	    h1:m1 must be less than h2:m2
-#	acl aclname url_regex [-i] ^http:// ...	# regex matching on whole URL
-#	acl aclname urlpath_regex [-i] \.gif$ ...	# regex matching on URL path
-#	acl aclname port     80 70 21 ...
-#	acl aclname port     0-1024 ...		# ranges allowed
-#	acl aclname myport   3128 ...		# (local socket TCP port)
-#	acl aclname proto    HTTP FTP ...
-#	acl aclname method   GET POST ...
-#	acl aclname browser  [-i] regexp ...
-#	  # pattern match on User-Agent header (see also req_header below)
-#	acl aclname referer_regex  [-i] regexp ...
-#	  # pattern match on Referer header
-#	  # Referer is highly unreliable, so use with care
-#	acl aclname ident    username ...
-#	acl aclname ident_regex [-i] pattern ...
-#	  # string match on ident output.
-#	  # use REQUIRED to accept any non-null ident.
-#	acl aclname src_as   number ...
-#	acl aclname dst_as   number ...
+#	acl aclname src_as number ...
+#	acl aclname dst_as number ...
+#	  # [fast]
 #	  # Except for access control, AS numbers can be used for
 #	  # routing of requests to specific caches. Here's an
 #	  # example for routing all requests for AS#1241 and only
@@ -456,11 +489,63 @@
 #	  # cache_peer_access mycache.mydomain.net allow asexample
 #	  # cache_peer_access mycache_mydomain.net deny all
 #
+#	acl aclname peername myPeer ...
+#	  # [fast]
+#	  # match against a named cache_peer entry
+#	  # set unique name= on cache_peer lines for reliable use.
+#
+#	acl aclname time [day-abbrevs] [h1:m1-h2:m2]
+#	  # [fast]
+#	  #  day-abbrevs:
+#	  #	S - Sunday
+#	  #	M - Monday
+#	  #	T - Tuesday
+#	  #	W - Wednesday
+#	  #	H - Thursday
+#	  #	F - Friday
+#	  #	A - Saturday
+#	  #  h1:m1 must be less than h2:m2
+#
+#	acl aclname url_regex [-i] ^http:// ...
+#	  # regex matching on whole URL [fast]
+#	acl aclname urlpath_regex [-i] \.gif$ ...
+#	  # regex matching on URL path [fast]
+#
+#	acl aclname port 80 70 21 0-1024...   # destination TCP port [fast]
+#	                                      # ranges are alloed
+#	acl aclname myport 3128 ...	          # local socket TCP port [fast]
+#	acl aclname myportname 3128 ...       # http(s)_port name [fast]
+#
+#	acl aclname proto HTTP FTP ...        # request protocol [fast]
+# 
+#	acl aclname method GET POST ...       # HTTP request method [fast]
+#
+#	acl aclname http_status 200 301 500- 400-403 ... 
+#	  # status code in reply [fast]
+#
+#	acl aclname browser [-i] regexp ...
+#	  # pattern match on User-Agent header (see also req_header below) [fast]
+#
+#	acl aclname referer_regex [-i] regexp ...
+#	  # pattern match on Referer header [fast]
+#	  # Referer is highly unreliable, so use with care
+#
+#	acl aclname ident username ...
+#	acl aclname ident_regex [-i] pattern ...
+#	  # string match on ident output [slow]
+#	  # use REQUIRED to accept any non-null ident.
+#
 #	acl aclname proxy_auth [-i] username ...
 #	acl aclname proxy_auth_regex [-i] pattern ...
-#	  # list of valid usernames
+#	  # perform http authentication challenge to the client and match against
+#	  # supplied credentials [slow]
+#	  #
+#	  # takes a list of allowed usernames.
 #	  # use REQUIRED to accept any valid username.
 #	  #
+#	  # Will use proxy authentication in forward-proxy scenarios, and plain
+#	  # http authenticaiton in reverse-proxy scenarios
+#	  #
 #	  # NOTE: when a Proxy-Authentication header is sent but it is not
 #	  # needed during ACL checking the username is NOT logged
 #	  # in access.log.
@@ -469,24 +554,24 @@
 #	  # to check username/password combinations (see
 #	  # auth_param directive).
 #	  #
-#	  # NOTE: proxy_auth can't be used in a transparent proxy as
-#	  # the browser needs to be configured for using a proxy in order
+#	  # NOTE: proxy_auth can't be used in a transparent/intercepting proxy
+#	  # as the browser needs to be configured for using a proxy in order
 #	  # to respond to proxy authentication.
 #
 #	acl aclname snmp_community string ...
-#	  # A community string to limit access to your SNMP Agent
+#	  # A community string to limit access to your SNMP Agent [fast]
 #	  # Example:
 #	  #
 #	  #	acl snmppublic snmp_community public
 #
 #	acl aclname maxconn number
 #	  # This will be matched when the client's IP address has
-#	  # more than <number> HTTP connections established.
+#	  # more than <number> HTTP connections established. [fast]
 #
 #	acl aclname max_user_ip [-s] number
 #	  # This will be matched when the user attempts to log in from more
 #	  # than <number> different ip addresses. The authenticate_ip_ttl
-#	  # parameter controls the timeout on the ip entries.
+#	  # parameter controls the timeout on the ip entries. [fast]
 #	  # If -s is specified the limit is strict, denying browsing
 #	  # from any further IP addresses until the ttl has expired. Without
 #	  # -s Squid will just annoy the user by "randomly" denying requests.
@@ -496,22 +581,22 @@
 #	  # clients may appear to come from multiple addresses if they are
 #	  # going through proxy farms, so a limit of 1 may cause user problems.
 #
-#	acl aclname req_mime_type mime-type1 ...
+#	acl aclname req_mime_type [-i] mime-type ...
 #	  # regex match against the mime type of the request generated
 #	  # by the client. Can be used to detect file upload or some
-#	  # types HTTP tunneling requests.
+#	  # types HTTP tunneling requests [fast]
 #	  # NOTE: This does NOT match the reply. You cannot use this
 #	  # to match the returned file type.
 #
 #	acl aclname req_header header-name [-i] any\.regex\.here
 #	  # regex match against any of the known request headers.  May be
 #	  # thought of as a superset of "browser", "referer" and "mime-type"
-#	  # ACLs.
+#	  # ACL [fast]
 #
-#	acl aclname rep_mime_type mime-type1 ...
+#	acl aclname rep_mime_type [-i] mime-type ...
 #	  # regex match against the mime type of the reply received by
 #	  # squid. Can be used to detect file download or some
-#	  # types HTTP tunneling requests.
+#	  # types HTTP tunneling requests. [fast]
 #	  # NOTE: This has no effect in http_access rules. It only has
 #	  # effect in rules that affect the reply data stream such as
 #	  # http_reply_access.
@@ -519,47 +604,54 @@
 #	acl aclname rep_header header-name [-i] any\.regex\.here
 #	  # regex match against any of the known reply headers. May be
 #	  # thought of as a superset of "browser", "referer" and "mime-type"
-#	  # ACLs.
+#	  # ACLs [fast]
 #
-#	acl acl_name external class_name [arguments...]
+#	acl aclname external class_name [arguments...]
 #	  # external ACL lookup via a helper class defined by the
-#	  # external_acl_type directive.
+#	  # external_acl_type directive [slow]
 #
 #	acl aclname user_cert attribute values...
 #	  # match against attributes in a user SSL certificate
-#	  # attribute is one of DN/C/O/CN/L/ST
+#	  # attribute is one of DN/C/O/CN/L/ST [fast]
 #
 #	acl aclname ca_cert attribute values...
 #	  # match against attributes a users issuing CA SSL certificate
-#	  # attribute is one of DN/C/O/CN/L/ST
+#	  # attribute is one of DN/C/O/CN/L/ST [fast]
 #
 #	acl aclname ext_user username ...
 #	acl aclname ext_user_regex [-i] pattern ...
-#	  # string match on username returned by external acl helper
+#	  # string match on username returned by external acl helper [slow]
 #	  # use REQUIRED to accept any non-null user name.
 #
-#Examples:
-#acl macaddress arp 09:00:2b:23:45:67
-#acl myexample dst_as 1241
-#acl password proxy_auth REQUIRED
-#acl fileupload req_mime_type -i ^multipart/form-data$
-#acl javascript rep_mime_type -i ^application/x-javascript$
+#	acl aclname tag tagvalue ...
+#	  # string match on tag returned by external acl helper [slow]
+#
+#	Examples:
+#		acl macaddress arp 09:00:2b:23:45:67
+#		acl myexample dst_as 1241
+#		acl password proxy_auth REQUIRED
+#		acl fileupload req_mime_type -i ^multipart/form-data$
+#		acl javascript rep_mime_type -i ^application/x-javascript$
 #
 #Default:
 # acl all src all
 #
-#Recommended minimum configuration:
-acl manager proto cache_object
-acl localhost src 127.0.0.1/32
-acl to_localhost dst 127.0.0.0/8
 #
+# Recommended minimum configuration:
+#
+acl manager proto cache_object
+acl localhost src 127.0.0.1/32 ::1
+acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 ::1
+
 # Example rule allowing access from your local networks.
 # Adapt to list your (internal) IP networks from where browsing
 # should be allowed
 acl localnet src 10.0.0.0/8	# RFC1918 possible internal network
 acl localnet src 172.16.0.0/12	# RFC1918 possible internal network
 acl localnet src 192.168.0.0/16	# RFC1918 possible internal network
-#
+acl localnet src fc00::/7       # RFC 4193 local private network range
+acl localnet src fe80::/10      # RFC 4291 link-local (directly plugged) machines
+
 acl SSL_ports port 443
 acl Safe_ports port 80		# http
 acl Safe_ports port 21		# ftp
@@ -573,6 +665,77 @@ acl Safe_ports port 591		# filemaker
 acl Safe_ports port 777		# multiling http
 acl CONNECT method CONNECT
 
+#  TAG: follow_x_forwarded_for
+#	Allowing or Denying the X-Forwarded-For header to be followed to
+#	find the original source of a request.
+#
+#	Requests may pass through a chain of several other proxies
+#	before reaching us.  The X-Forwarded-For header will contain a
+#	comma-separated list of the IP addresses in the chain, with the
+#	rightmost address being the most recent.
+#
+#	If a request reaches us from a source that is allowed by this
+#	configuration item, then we consult the X-Forwarded-For header
+#	to see where that host received the request from.  If the
+#	X-Forwarded-For header contains multiple addresses, we continue
+#	backtracking until we reach an address for which we are not allowed
+#	to follow the X-Forwarded-For header, or until we reach the first
+#	address in the list. For the purpose of ACL used in the
+#	follow_x_forwarded_for directive the src ACL type always matches
+#	the address we are testing and srcdomain matches its rDNS.
+#
+#	The end result of this process is an IP address that we will
+#	refer to as the indirect client address.  This address may
+#	be treated as the client address for access control, ICAP, delay
+#	pools and logging, depending on the acl_uses_indirect_client,
+#	icap_uses_indirect_client, delay_pool_uses_indirect_client and
+#	log_uses_indirect_client options.
+#
+#	This clause only supports fast acl types.
+#	See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details.
+#
+#	SECURITY CONSIDERATIONS:
+#
+#		Any host for which we follow the X-Forwarded-For header
+#		can place incorrect information in the header, and Squid
+#		will use the incorrect information as if it were the
+#		source address of the request.  This may enable remote
+#		hosts to bypass any access control restrictions that are
+#		based on the client's source addresses.
+#
+#	For example:
+#
+#		acl localhost src 127.0.0.1
+#		acl my_other_proxy srcdomain .proxy.example.com
+#		follow_x_forwarded_for allow localhost
+#		follow_x_forwarded_for allow my_other_proxy
+#Default:
+# follow_x_forwarded_for deny all
+
+#  TAG: acl_uses_indirect_client	on|off
+#	Controls whether the indirect client address
+#	(see follow_x_forwarded_for) is used instead of the
+#	direct client address in acl matching.
+#Default:
+# acl_uses_indirect_client on
+
+#  TAG: delay_pool_uses_indirect_client	on|off
+# Note: This option is only available if Squid is rebuilt with the
+#       --enable-follow-x-forwarded-for and --enable-delay-pools option
+#
+#	Controls whether the indirect client address
+#	(see follow_x_forwarded_for) is used instead of the
+#	direct client address in delay pools.
+#Default:
+# delay_pool_uses_indirect_client on
+
+#  TAG: log_uses_indirect_client	on|off
+#	Controls whether the indirect client address
+#	(see follow_x_forwarded_for) is used instead of the
+#	direct client address in the access log.
+#Default:
+# log_uses_indirect_client on
+
 #  TAG: http_access
 #	Allowing or Denying access based on defined access lists
 #
@@ -588,37 +751,58 @@ acl CONNECT method CONNECT
 #	opposite of the last line in the list.  If the last line was
 #	deny, the default is allow.  Conversely, if the last line
 #	is allow, the default will be deny.  For these reasons, it is a
-#	good idea to have an "deny all" or "allow all" entry at the end
-#	of your access lists to avoid potential confusion.
+#	good idea to have an "deny all" entry at the end of your access
+#	lists to avoid potential confusion.
+#
+#	This clause supports both fast and slow acl types.
+#	See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details.
 #
 #Default:
 # http_access deny all
 #
-#Recommended minimum configuration:
+
+#
+# Recommended minimum Access Permission configuration:
 #
 # Only allow cachemgr access from localhost
 http_access allow manager localhost
 http_access deny manager
-# Deny requests to unknown ports
+
+# Deny requests to certain unsafe ports
 http_access deny !Safe_ports
-# Deny CONNECT to other than SSL ports
+
+# Deny CONNECT to other than secure SSL ports
 http_access deny CONNECT !SSL_ports
-#
+
 # We strongly recommend the following be uncommented to protect innocent
 # web applications running on the proxy server who think the only
 # one who can access services on "localhost" is a local user
 #http_access deny to_localhost
+
 #
 # INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS
+#
 
 # Example rule allowing access from your local networks.
 # Adapt localnet in the ACL section to list your (internal) IP networks
 # from where browsing should be allowed
 http_access allow localnet
+http_access allow localhost
 
 # And finally deny all other access to this proxy
 http_access deny all
 
+#  TAG: adapted_http_access
+#	Allowing or Denying access based on defined access lists
+#
+#	Essentially identical to http_access, but runs after redirectors
+#	and ICAP/eCAP adaptation. Allowing access control based on their
+#	output.
+#
+#	If not set then only http_access is used.
+#Default:
+# none
+
 #  TAG: http_reply_access
 #	Allow replies to client requests. This is complementary to http_access.
 #
@@ -631,6 +815,8 @@ http_access deny all
 #	last line will apply. Thus it is good practice to end the rules
 #	with an "allow all" or "deny all" entry.
 #
+#	This clause supports both fast and slow acl types.
+#	See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details.
 #Default:
 # none
 
@@ -676,10 +862,12 @@ htcp_access deny all
 #
 #	See http_access for details
 #
-##Allow HTCP CLR requests from trusted peers
+#	This clause only supports fast acl types.
+#	See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details.
+#
+## Allow HTCP CLR requests from trusted peers
 #acl htcp_clr_peer src 172.16.1.2
 #htcp_clr_access allow htcp_clr_peer
-#
 #Default:
 # htcp_clr_access deny all
 
@@ -697,7 +885,9 @@ htcp_access deny all
 #	By default, allow all clients who passed the http_access rules
 #	to fetch MISSES from us.
 #
-#Default setting:
+#	This clause only supports fast acl types.
+#	See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details.
+#Default:
 # miss_access allow all
 
 #  TAG: ident_lookup_access
@@ -711,14 +901,16 @@ htcp_access deny all
 #	To enable ident lookups for specific client addresses, you
 #	can follow this example:
 #
-#	acl ident_aware_hosts src 198.168.1.0/255.255.255.0
+#	acl ident_aware_hosts src 198.168.1.0/24
 #	ident_lookup_access allow ident_aware_hosts
 #	ident_lookup_access deny all
 #
-#	Only src type ACL checks are fully supported.  A src_domain
+#	Only src type ACL checks are fully supported.  A srcdomain
 #	ACL might work at times, but it will not always provide
 #	the correct result.
 #
+#	This clause only supports fast acl types.
+#	See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details.
 #Default:
 # ident_lookup_access deny all
 
@@ -751,10 +943,14 @@ htcp_access deny all
 #	If you set this parameter none (the default), there will be
 #	no limit imposed.
 #
+#	Configuration Format is:
+#		reply_body_max_size SIZE UNITS [acl ...]
+#	ie.
+#		reply_body_max_size 10 MB
+#
 #Default:
 # none
 
-
 # NETWORK OPTIONS
 # -----------------------------------------------------------------------------
 
@@ -783,15 +979,21 @@ htcp_access deny all
 #
 #	Options:
 #
-#	   transparent	Support for transparent interception of
+#	   intercept	Support for IP-Layer interception of
 #			outgoing requests without browser settings.
+#			NP: disables authentication and IPv6 on the port.
 #
 #	   tproxy	Support Linux TPROXY for spoofing outgoing
 #			connections using the client IP address.
+#			NP: disables authentication and maybe IPv6 on the port.
 #
 #	   accel	Accelerator mode. Also needs at least one of
 #			vhost / vport / defaultsite.
 #
+#	   allow-direct	Allow direct forwarding in accelerator mode. Normally
+#			accelerated requests are denied direct forwarding as if
+#			never_direct was used.
+#
 #	   defaultsite=domainname
 #			What to use for the Host: header if it is not present
 #			in a request. Determines what site (not origin server)
@@ -810,6 +1012,16 @@ htcp_access deny all
 #	   protocol=	Protocol to reconstruct accelerated requests with.
 #			Defaults to http.
 #
+#	   ignore-cc	Ignore request Cache-Control headers.
+#
+#	   		Warning: This option violates HTTP specifications if
+#			used in non-accelerator setups.
+#
+#	   connection-auth[=on|off]
+#	                use connection-auth=off to tell Squid to prevent 
+#	                forwarding Microsoft connection oriented authentication
+#			(NTLM, Negotiate and Kerberos)
+#
 #	   disable-pmtu-discovery=
 #			Control Path-MTU discovery usage:
 #			    off		lets OS decide on what to do (default).
@@ -826,11 +1038,38 @@ htcp_access deny all
 #			sporadically hang or never complete requests set
 #			disable-pmtu-discovery option to 'transparent'.
 #
+#	   sslBump 	Intercept each CONNECT request matching ssl_bump ACL,
+#			establish secure connection with the client and with
+#			the server, decrypt HTTP messages as they pass through
+#			Squid, and treat them as unencrypted HTTP messages,
+#			becoming the man-in-the-middle.
+#
+#			When this option is enabled, additional options become
+#			available to specify SSL-related properties of the
+#			client-side connection: cert, key, version, cipher,
+#			options, clientca, cafile, capath, crlfile, dhparams,
+#			sslflags, and sslcontext. See the https_port directive
+#			for more information on these options.
+#
+#			The ssl_bump option is required to fully enable
+#			the SslBump feature.
+#
+#	   name=	Specifies a internal name for the port. Defaults to
+#			the port specification (port or addr:port)
+#
+#	   tcpkeepalive[=idle,interval,timeout]
+#			Enable TCP keepalive probes of idle connections.
+#			In seconds; idle is the initial time before TCP starts
+#			probing the connection, interval how often to probe, and
+#			timeout the time before giving up.
+#
 #	If you run Squid on a dual-homed machine with an internal
 #	and an external interface we recommend you to specify the
 #	internal address:port in http_port. This way Squid will only be
 #	visible on the internal address.
 #
+#
+
 # Squid normally listens to port 3128
 http_port 3128
 
@@ -933,6 +1172,8 @@ http_port 3128
 #	   vport=NN	As above, but uses specified port number rather
 #			than the https_port number. Implies accel.
 #
+#	   name=	Specifies a internal name for the port. Defaults to
+#			the port specification (port or addr:port)
 #
 #Default:
 # none
@@ -945,7 +1186,7 @@ http_port 3128
 #	tcp_outgoing_tos ds-field [!]aclname ...
 #
 #	Example where normal_service_net uses the TOS value 0x00
-#	and normal_service_net uses 0x20
+#	and good_service_net uses 0x20
 #
 #	acl normal_service_net src 10.0.0.0/255.255.255.0
 #	acl good_service_net src 10.0.1.0/255.255.255.0
@@ -953,8 +1194,8 @@ http_port 3128
 #	tcp_outgoing_tos 0x20 good_service_net
 #
 #	TOS/DSCP values really only have local significance - so you should
-#	know what you're specifying. For more information, see RFC2474 and
-#	RFC3260.
+#	know what you're specifying. For more information, see RFC2474,
+#	RFC2475, and RFC3260.
 #
 #	The TOS/DSCP byte must be exactly that - a octet value  0 - 255, or
 #	"default" to use whatever default your host has. Note that in
@@ -968,7 +1209,6 @@ http_port 3128
 #	incompatible with the use of server side persistent connections. To
 #	ensure correct results it is best to set server_persisten_connections
 #	to off when using this directive in such configurations.
-#
 #Default:
 # none
 
@@ -976,6 +1216,50 @@ http_port 3128
 #	Allows you to select a TOS/Diffserv value to mark client-side
 #	connections with, based on the username or source address
 #	making the request.
+#Default:
+# none
+
+#  TAG: qos_flows
+# Note: This option is only available if Squid is rebuilt with the
+#       --enable-zph-qos option
+#
+#	Allows you to select a TOS/DSCP value to mark outgoing
+#	connections with, based on where the reply was sourced.
+#
+#	TOS values really only have local significance - so you should
+#	know what you're specifying. For more information, see RFC2474,
+#	RFC2475, and RFC3260.
+#
+#	The TOS/DSCP byte must be exactly that - octet value 0x00-0xFF.
+#	Note that in practice often only values up to 0x3F are usable
+#	as the two highest bits have been redefined for use by ECN
+#	(RFC3168).
+#
+#	This setting is configured by setting the source TOS values:
+#
+#	local-hit=0xFF		Value to mark local cache hits.
+#
+#	sibling-hit=0xFF	Value to mark hits from sibling peers.
+#
+#	parent-hit=0xFF		Value to mark hits from parent peers.
+#
+#
+#	NOTE: 'miss' preserve feature is only possible on Linux at this time.
+#
+#	For the following to work correctly, you will need to patch your
+#	linux kernel with the TOS preserving ZPH patch.
+#	The kernel patch can be downloaded from http://zph.bratcheda.org
+#
+#	disable-preserve-miss
+#		By default, the existing TOS value of the response coming
+#		from the remote server will be retained and masked with
+#		miss-mark. This option disables that feature.
+#
+#	miss-mask=0xFF
+#		Allows you to mask certain bits in the TOS received from the
+#		remote server, before copying the value to the TOS sent
+#		towards clients.
+#		Default: 0xFF (TOS from server is not changed).
 #
 #Default:
 # none
@@ -992,11 +1276,11 @@ http_port 3128
 #	source address 10.1.0.2 and the rest will be forwarded with
 #	source address 10.1.0.3.
 #
-#	acl normal_service_net src 10.0.0.0/255.255.255.0
-#	acl good_service_net src 10.0.1.0/255.255.255.0
-#	tcp_outgoing_address 10.0.0.1 normal_service_net
-#	tcp_outgoing_address 10.0.0.2 good_service_net
-#	tcp_outgoing_address 10.0.0.3
+#	acl normal_service_net src 10.0.0.0/24
+#	acl good_service_net src 10.0.2.0/24
+#	tcp_outgoing_address 10.1.0.1 normal_service_net
+#	tcp_outgoing_address 10.1.0.2 good_service_net
+#	tcp_outgoing_address 10.1.0.3
 #
 #	Processing proceeds in the order specified, and stops at first fully
 #	matching line.
@@ -1006,10 +1290,43 @@ http_port 3128
 #	ensure correct results it is best to set server_persistent_connections
 #	to off when using this directive in such configurations.
 #
+#
+#        IPv6 Magic:
+#
+#	Squid is built with a capability of bridging the IPv4 and IPv6 
+#	internets.
+#	tcp_outgoing_address as exampled above breaks this bridging by forcing
+#	all outbound traffic through a certain IPv4 which may be on the wrong
+#	side of the IPv4/IPv6 boundary.
+#
+#	To operate with tcp_outgoing_address and keep the bridging benefits
+#	an additional ACL needs to be used which ensures the IPv6-bound traffic
+#	is never forced or permitted out the IPv4 interface.
+#
+#	acl to_ipv6 dst ipv6
+#	tcp_outgoing_address 2002::c001 good_service_net to_ipv6
+#	tcp_outgoing_address 10.1.0.2 good_service_net !to_ipv6
+#
+#	tcp_outgoing_address 2002::beef normal_service_net to_ipv6
+#	tcp_outgoing_address 10.1.0.1 normal_service_net !to_ipv6
+#
+#	tcp_outgoing_address 2002::1 to_ipv6
+#	tcp_outgoing_address 10.1.0.3 !to_ipv6
+#
+#	WARNING:
+#	  'dst ipv6' bases its selection assuming DIRECT access.
+#	  If peers are used the peername ACL are needed to select outgoing
+#	  address which can link to the peer.
+#
+#	  'dst ipv6' is a slow ACL. It will only work here if 'dst' is used
+#	  previously in the http_access rules to locate the destination IP.
+#	  Some more magic may be needed for that:
+#	    http_access allow to_ipv6 !all
+#	  (meaning, allow if to IPv6 but not from anywhere ;)
+#
 #Default:
 # none
 
-
 # SSL OPTIONS
 # -----------------------------------------------------------------------------
 
@@ -1019,7 +1336,6 @@ http_port 3128
 #
 #	Some browsers (especially MSIE) bugs out on SSL shutdown
 #	messages.
-#
 #Default:
 # ssl_unclean_shutdown off
 
@@ -1029,7 +1345,6 @@ http_port 3128
 #
 #	The OpenSSL engine to use. You will need to set this if you
 #	would like to use hardware SSL acceleration for example.
-#
 #Default:
 # none
 
@@ -1038,7 +1353,6 @@ http_port 3128
 #       --enable-ssl option
 #
 #	Client SSL Certificate to use when proxying https:// URLs
-#
 #Default:
 # none
 
@@ -1047,7 +1361,6 @@ http_port 3128
 #       --enable-ssl option
 #
 #	Client SSL Key to use when proxying https:// URLs
-#
 #Default:
 # none
 
@@ -1056,7 +1369,6 @@ http_port 3128
 #       --enable-ssl option
 #
 #	SSL version level to use when proxying https:// URLs
-#
 #Default:
 # sslproxy_version 1
 
@@ -1065,7 +1377,19 @@ http_port 3128
 #       --enable-ssl option
 #
 #	SSL engine options to use when proxying https:// URLs
-#
+#	
+#	The most important being:
+#
+#		NO_SSLv2  Disallow the use of SSLv2
+#		NO_SSLv3  Disallow the use of SSLv3
+#		NO_TLSv1  Disallow the use of TLSv1
+#		SINGLE_DH_USE
+#			Always create a new key when using
+#			temporary/ephemeral DH key exchanges
+#	
+#	These options vary depending on your SSL engine.
+#	See the OpenSSL SSL_CTX_set_options documentation for a
+#	complete list of possible options.
 #Default:
 # none
 
@@ -1075,6 +1399,7 @@ http_port 3128
 #
 #	SSL cipher list to use when proxying https:// URLs
 #
+#	Colon separated list of supported ciphers.
 #Default:
 # none
 
@@ -1084,7 +1409,6 @@ http_port 3128
 #
 #	file containing CA certificates to use when verifying server
 #	certificates while proxying https:// URLs
-#
 #Default:
 # none
 
@@ -1094,7 +1418,35 @@ http_port 3128
 #
 #	directory containing CA certificates to use when verifying
 #	server certificates while proxying https:// URLs
+#Default:
+# none
+
+#  TAG: ssl_bump
+# Note: This option is only available if Squid is rebuilt with the
+#       --enable-ssl option
+#
+#	This ACL controls which CONNECT requests to an http_port
+#	marked with an sslBump flag are actually "bumped". Please 
+#	see the sslBump flag of an http_port option for more details
+#	about decoding proxied SSL connections.
+#
+#	By default, no requests are bumped.
+#
+#	See also: http_port sslBump
+#   
+#	This clause only supports fast acl types.
+#	See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details.
+#
 #
+#	# Example: Bump all requests except those originating from localhost and 
+#	# those going to webax.com or example.com sites.
+#
+#	acl localhost src 127.0.0.1/32
+#	acl broken_sites dstdomain .webax.com
+#	acl broken_sites dstdomain .example.com
+#	ssl_bump deny localhost
+#	ssl_bump deny broken_sites
+#	ssl_bump allow all
 #Default:
 # none
 
@@ -1103,11 +1455,39 @@ http_port 3128
 #       --enable-ssl option
 #
 #	Various flags modifying the use of SSL while proxying https:// URLs:
-#	    DONT_VERIFY_PEER	Accept certificates even if they fail to
-#				verify.
+#	    DONT_VERIFY_PEER	Accept certificates that fail verification.
+#				For refined control, see sslproxy_cert_error.
 #	    NO_DEFAULT_CA	Don't use the default CA list built in
 #				to OpenSSL.
+#Default:
+# none
+
+#  TAG: sslproxy_cert_error
+# Note: This option is only available if Squid is rebuilt with the
+#       --enable-ssl option
+#
+#	Use this ACL to bypass server certificate validation errors.
+#
+#	For example, the following lines will bypass all validation errors
+#	when talking to servers located at 172.16.0.0/16. All other
+#	validation errors will result in ERR_SECURE_CONNECT_FAIL error.
+#
+#		acl BrokenServersAtTrustedIP dst 172.16.0.0/16
+#		sslproxy_cert_error allow BrokenServersAtTrustedIP
+#		sslproxy_cert_error deny all
+#
+#	This clause only supports fast acl types.
+#	See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details.
+#	Using slow acl types may result in server crashes
 #
+#	Without this option, all server certificate validation errors
+#	terminate the transaction. Bypassing validation errors is dangerous
+#	because an error usually implies that the server cannot be trusted and
+#	the connection may be insecure.
+#
+#	See also: sslproxy_flags and DONT_VERIFY_PEER.
+#
+#	Default setting:  sslproxy_cert_error deny all
 #Default:
 # none
 
@@ -1119,254 +1499,265 @@ http_port 3128
 #	when using encrypted SSL certificate keys. If not specified
 #	keys must either be unencrypted, or Squid started with the -N
 #	option to allow it to query interactively for the passphrase.
-#
 #Default:
 # none
 
-
 # OPTIONS WHICH AFFECT THE NEIGHBOR SELECTION ALGORITHM
 # -----------------------------------------------------------------------------
 
 #  TAG: cache_peer
 #	To specify other caches in a hierarchy, use the format:
-#
+#	
 #		cache_peer hostname type http-port icp-port [options]
-#
+#	
 #	For example,
-#
+#	
 #	#                                        proxy  icp
 #	#          hostname             type     port   port  options
 #	#          -------------------- -------- ----- -----  -----------
-#	cache_peer parent.foo.net       parent    3128  3130  proxy-only default
+#	cache_peer parent.foo.net       parent    3128  3130  default
 #	cache_peer sib1.foo.net         sibling   3128  3130  proxy-only
 #	cache_peer sib2.foo.net         sibling   3128  3130  proxy-only
-#
-#	      type:  either 'parent', 'sibling', or 'multicast'.
-#
-#	proxy-port:  The port number where the cache listens for proxy
-#		     requests.
-#
-#	  icp-port:  Used for querying neighbor caches about
-#		     objects.  To have a non-ICP neighbor
-#		     specify '7' for the ICP port and make sure the
-#		     neighbor machine has the UDP echo port
-#		     enabled in its /etc/inetd.conf file.
-#		NOTE: Also requires icp_port option enabled to send/receive
-#		      requests via this method.
-#
-#	    options: proxy-only
-#		     weight=n
-#		     basetime=n
-#		     ttl=n
-#		     no-query
-#		     background-ping
-#		     default
-#		     round-robin
-#		     weighted-round-robin
-#		     carp
-#		     multicast-responder
-#		     closest-only
-#		     no-digest
-#		     no-netdb-exchange
-#		     no-delay
-#		     login=user:password | PASS | *:password
-#		     connect-timeout=nn
-#		     digest-url=url
-#		     allow-miss
-#		     max-conn=n
-#		     htcp
-#		     htcp-oldsquid
-#		     originserver
-#		     name=xxx
-#		     forceddomain=name
-#		     ssl
-#		     sslcert=/path/to/ssl/certificate
-#		     sslkey=/path/to/ssl/key
-#		     sslversion=1|2|3|4
-#		     sslcipher=...
-#		     ssloptions=...
-#		     front-end-https[=on|auto]
-#
-#		     use 'proxy-only' to specify objects fetched
-#		     from this cache should not be saved locally.
-#
-#		     use 'weight=n' to affect the selection of a peer
-#		     during any weighted peer-selection mechanisms.
-#		     The weight must be an integer; default is 1,
-#		     larger weights are favored more.
-#		     This option does not affect parent selection if a peering
-#		     protocol is not in use.
-#
-#		     use 'basetime=n' to specify a base amount to
-#		     be subtracted from round trip times of parents.
-#		     It is subtracted before division by weight in calculating
-#		     which parent to fectch from. If the rtt is less than the
-#		     base time the rtt is set to a minimal value.
-#
-#		     use 'ttl=n' to specify a IP multicast TTL to use
-#		     when sending an ICP queries to this address.
-#		     Only useful when sending to a multicast group.
-#		     Because we don't accept ICP replies from random
-#		     hosts, you must configure other group members as
-#		     peers with the 'multicast-responder' option below.
-#
-#		     use 'no-query' to NOT send ICP queries to this
-#		     neighbor.
-#
-#		     use 'background-ping' to only send ICP queries to this
-#		     neighbor infrequently. This is used to keep the neighbor
-#		     round trip time updated and is usually used in
-#		     conjunction with weighted-round-robin.
-#
-#		     use 'default' if this is a parent cache which can
-#		     be used as a "last-resort" if a peer cannot be located
-#		     by any of the peer-selection mechanisms.
-#		     If specified more than once, only the first is used.
-#
-#		     use 'round-robin' to define a set of parents which
-#		     should be used in a round-robin fashion in the
-#		     absence of any ICP queries.
-#
-#		     use 'weighted-round-robin' to define a set of parents
-#		     which should be used in a round-robin fashion with the
-#		     frequency of each parent being based on the round trip
-#		     time. Closer parents are used more often.
-#		     Usually used for background-ping parents.
-#
-#		     use 'carp' to define a set of parents which should
-#		     be used as a CARP array. The requests will be
-#		     distributed among the parents based on the CARP load
-#		     balancing hash function based on their weight.
-#
-#		     'multicast-responder' indicates the named peer
-#		     is a member of a multicast group.  ICP queries will
-#		     not be sent directly to the peer, but ICP replies
-#		     will be accepted from it.
-#
-#		     'closest-only' indicates that, for ICP_OP_MISS
-#		     replies, we'll only forward CLOSEST_PARENT_MISSes
-#		     and never FIRST_PARENT_MISSes.
-#
-#		     use 'no-digest' to NOT request cache digests from
-#		     this neighbor.
-#
-#		     'no-netdb-exchange' disables requesting ICMP
-#		     RTT database (NetDB) from the neighbor.
-#
-#		     use 'no-delay' to prevent access to this neighbor
-#		     from influencing the delay pools.
-#
-#		     use 'login=user:password' if this is a personal/workgroup
-#		     proxy and your parent requires proxy authentication.
-#		     Note: The string can include URL escapes (i.e. %20 for
-#		     spaces). This also means % must be written as %%.
-#
-#		     use 'login=PASS' if users must authenticate against
-#		     the upstream proxy or in the case of a reverse proxy
-#		     configuration, the origin web server.  This will pass
-#		     the users credentials as they are to the peer.
-#		     This only works for the Basic HTTP authentication scheme.
-#		     Note: To combine this with proxy_auth both proxies must
-#		     share the same user database as HTTP only allows for
-#		     a single login (one for proxy, one for origin server).
-#		     Also be warned this will expose your users proxy
-#		     password to the peer. USE WITH CAUTION
-#
-#		     use 'login=*:password' to pass the username to the
-#		     upstream cache, but with a fixed password. This is meant
-#		     to be used when the peer is in another administrative
-#		     domain, but it is still needed to identify each user.
-#		     The star can optionally be followed by some extra
-#		     information which is added to the username. This can
-#		     be used to identify this proxy to the peer, similar to
-#		     the login=username:password option above.
-#
-#		     use 'connect-timeout=nn' to specify a peer
-#		     specific connect timeout (also see the
-#		     peer_connect_timeout directive)
-#
-#		     use 'digest-url=url' to tell Squid to fetch the cache
-#		     digest (if digests are enabled) for this host from
-#		     the specified URL rather than the Squid default
-#		     location.
-#
-#		     use 'allow-miss' to disable Squid's use of only-if-cached
-#		     when forwarding requests to siblings. This is primarily
-#		     useful when icp_hit_stale is used by the sibling. To
-#		     extensive use of this option may result in forwarding
-#		     loops, and you should avoid having two-way peerings
-#		     with this option. (for example to deny peer usage on
-#		     requests from peer by denying cache_peer_access if the
-#		     source is a peer)
-#
-#		     use 'max-conn=n' to limit the amount of connections Squid
-#		     may open to this peer.
-#
-#		     use 'htcp' to send HTCP, instead of ICP, queries
-#		     to the neighbor.  You probably also want to
-#		     set the "icp port" to 4827 instead of 3130.
-#		     You MUST also set htcp_access expicitly. The default of
-#		     deny all will prevent peer traffic.
-#
-#		     use 'htcp-oldsquid' to send HTCP to old Squid versions
-#		     You MUST also set htcp_access expicitly. The default of
-#		     deny all will prevent peer traffic.		     
-#
-#		     'originserver' causes this parent peer to be contacted as
-#		     a origin server. Meant to be used in accelerator setups.
-#
-#		     use 'name=xxx' if you have multiple peers on the same
-#		     host but different ports. This name can be used to
-#		     differentiate the peers in cache_peer_access and similar
-#		     directives.
-#
-#		     use 'forceddomain=name' to forcibly set the Host header
-#		     of requests forwarded to this peer. Useful in accelerator
-#		     setups where the server (peer) expects a certain domain
-#		     name and using redirectors to feed this domain name
-#		     is not feasible.
-#
-#		     use 'ssl' to indicate connections to this peer should
-#		     be SSL/TLS encrypted.
-#
-#		     use 'sslcert=/path/to/ssl/certificate' to specify a client
-#		     SSL certificate to use when connecting to this peer.
-#
-#		     use 'sslkey=/path/to/ssl/key' to specify the private SSL
-#		     key corresponding to sslcert above. If 'sslkey' is not
-#		     specified 'sslcert' is assumed to reference a
-#		     combined file containing both the certificate and the key.
-#
-#		     use sslversion=1|2|3|4 to specify the SSL version to use
-#		     when connecting to this peer
-#			1 = automatic (default)
-#			2 = SSL v2 only
-#			3 = SSL v3 only
-#			4 = TLS v1 only
-#
-#		     use sslcipher=... to specify the list of valid SSL ciphers
-#		     to use when connecting to this peer.
-#
-#		     use ssloptions=... to specify various SSL engine options:
-#			NO_SSLv2  Disallow the use of SSLv2
-#			NO_SSLv3  Disallow the use of SSLv3
-#			NO_TLSv1  Disallow the use of TLSv1
-#		     See src/ssl_support.c or the OpenSSL documentation for
-#		     a more complete list.
-#
-#		     use sslcafile=... to specify a file containing
-#		     additional CA certificates to use when verifying the
-#		     peer certificate.
-#
-#		     use sslcapath=... to specify a directory containing
-#		     additional CA certificates to use when verifying the
-#		     peer certificate.
-#
-#		     use sslcrlfile=... to specify a certificate revocation
-#		     list file to use when verifying the peer certificate.
-#		     
-#		     use sslflags=... to specify various flags modifying the
-#		     SSL implementation:
+#	cache_peer example.com          parent    80       0  no-query default
+#	cache_peer cdn.example.com      sibling   3128     0  
+#	
+#	      type:	either 'parent', 'sibling', or 'multicast'.
+#	
+#	proxy-port:	The port number where the peer accept HTTP requests.
+#			For other Squid proxies this is usually 3128
+#			For web servers this is usually 80
+#	
+#	  icp-port:	Used for querying neighbor caches about objects.
+#			Set to 0 if the peer does not support ICP or HTCP.
+#			See ICP and HTCP options below for additional details.
+#	
+#	
+#	==== ICP OPTIONS ====
+#	
+#	You MUST also set icp_port and icp_access explicitly when using these options.
+#	The defaults will prevent peer traffic using ICP.
+#	
+#	
+#	no-query	Disable ICP queries to this neighbor.
+#	
+#	multicast-responder
+#			Indicates the named peer is a member of a multicast group.
+#			ICP queries will not be sent directly to the peer, but ICP
+#			replies will be accepted from it.
+#	
+#	closest-only	Indicates that, for ICP_OP_MISS replies, we'll only forward
+#			CLOSEST_PARENT_MISSes and never FIRST_PARENT_MISSes.
+#	
+#	background-ping
+#			To only send ICP queries to this neighbor infrequently.
+#			This is used to keep the neighbor round trip time updated
+#			and is usually used in conjunction with weighted-round-robin.
+#	
+#	
+#	==== HTCP OPTIONS ====
+#	
+#	You MUST also set htcp_port and htcp_access explicitly when using these options.
+#	The defaults will prevent peer traffic using HTCP.
+#	
+#	
+#	htcp		Send HTCP, instead of ICP, queries to the neighbor.
+#			You probably also want to set the "icp-port" to 4827
+#			instead of 3130.
+#	
+#	htcp-oldsquid	Send HTCP to old Squid versions.
+#	
+#	htcp-no-clr	Send HTCP to the neighbor but without
+#			sending any CLR requests.  This cannot be used with
+#			htcp-only-clr.
+#	
+#	htcp-only-clr	Send HTCP to the neighbor but ONLY CLR requests.
+#			This cannot be used with htcp-no-clr.
+#	
+#	htcp-no-purge-clr
+#			Send HTCP to the neighbor including CLRs but only when
+#			they do not result from PURGE requests.
+#	
+#	htcp-forward-clr
+#			Forward any HTCP CLR requests this proxy receives to the peer.
+#	
+#	
+#	==== PEER SELECTION METHODS ====
+#	
+#	The default peer selection method is ICP, with the first responding peer
+#	being used as source. These options can be used for better load balancing.
+#	
+#	
+#	default		This is a parent cache which can be used as a "last-resort"
+#			if a peer cannot be located by any of the peer-selection methods.
+#			If specified more than once, only the first is used.
+#	
+#	round-robin	Load-Balance parents which should be used in a round-robin
+#			fashion in the absence of any ICP queries.
+#			weight=N can be used to add bias.
+#	
+#	weighted-round-robin
+#			Load-Balance parents which should be used in a round-robin
+#			fashion with the frequency of each parent being based on the
+#			round trip time. Closer parents are used more often.
+#			Usually used for background-ping parents.
+#			weight=N can be used to add bias.
+#	
+#	carp		Load-Balance parents which should be used as a CARP array.
+#			The requests will be distributed among the parents based on the
+#			CARP load balancing hash function based on their weight.
+#	
+#	userhash	Load-balance parents based on the client proxy_auth or ident username.
+#	
+#	sourcehash	Load-balance parents based on the client source IP.
+#
+#	multicast-siblings
+#			To be used only for cache peers of type "multicast".
+#			ALL members of this multicast group have "sibling"
+#			relationship with it, not "parent".  This is to a mulicast
+#			group when the requested object would be fetched only from
+#			a "parent" cache, anyway.  It's useful, e.g., when
+#			configuring a pool of redundant Squid proxies, being
+#			members of the same multicast group.
+#	
+#	
+#	==== PEER SELECTION OPTIONS ====
+#	
+#	weight=N	use to affect the selection of a peer during any weighted
+#			peer-selection mechanisms.
+#			The weight must be an integer; default is 1,
+#			larger weights are favored more.
+#			This option does not affect parent selection if a peering
+#			protocol is not in use.
+#	
+#	basetime=N	Specify a base amount to be subtracted from round trip
+#			times of parents.
+#			It is subtracted before division by weight in calculating
+#			which parent to fectch from. If the rtt is less than the
+#			base time the rtt is set to a minimal value.
+#	
+#	ttl=N		Specify a IP multicast TTL to use when sending an ICP
+#			queries to this address.
+#			Only useful when sending to a multicast group.
+#			Because we don't accept ICP replies from random
+#			hosts, you must configure other group members as
+#			peers with the 'multicast-responder' option.
+#	
+#	no-delay	To prevent access to this neighbor from influencing the
+#			delay pools.
+#	
+#	digest-url=URL	Tell Squid to fetch the cache digest (if digests are
+#			enabled) for this host from the specified URL rather
+#			than the Squid default location.
+#	
+#	
+#	==== ACCELERATOR / REVERSE-PROXY OPTIONS ====
+#	
+#	originserver	Causes this parent to be contacted as an origin server.
+#			Meant to be used in accelerator setups when the peer
+#			is a web server.
+#	
+#	forceddomain=name
+#			Set the Host header of requests forwarded to this peer.
+#			Useful in accelerator setups where the server (peer)
+#			expects a certain domain name but clients may request
+#			others. ie example.com or www.example.com
+#	
+#	no-digest	Disable request of cache digests.
+#	
+#	no-netdb-exchange
+#			Disables requesting ICMP RTT database (NetDB).
+#	
+#	
+#	==== AUTHENTICATION OPTIONS ====
+#	
+#	login=user:password
+#			If this is a personal/workgroup proxy and your parent
+#			requires proxy authentication.
+#			
+#			Note: The string can include URL escapes (i.e. %20 for
+#			spaces). This also means % must be written as %%.
+#	
+#	login=PROXYPASS
+#			Send login details received from client to this peer.
+#			Authentication is not required, nor changed.
+#			
+#			Note: This will pass any form of authentication but
+#			only Basic auth will work through a proxy unless the
+#			connection-auth options are also used.
+#	
+#	login=PASS	Send login details received from client to this peer.
+#			Authentication is not required by this option.
+#			If there are no client-provided authentication headers
+#			to pass on, but username and password are available
+#			from either proxy login or an external ACL user= and
+#			password= result tags they may be sent instead.
+#			
+#			Note: To combine this with proxy_auth both proxies must
+#			share the same user database as HTTP only allows for
+#			a single login (one for proxy, one for origin server).
+#			Also be warned this will expose your users proxy
+#			password to the peer. USE WITH CAUTION
+#	
+#	login=*:password
+#			Send the username to the upstream cache, but with a
+#			fixed password. This is meant to be used when the peer
+#			is in another administrative domain, but it is still
+#			needed to identify each user.
+#			The star can optionally be followed by some extra
+#			information which is added to the username. This can
+#			be used to identify this proxy to the peer, similar to
+#			the login=username:password option above.
+#	
+#	connection-auth=on|off
+#			Tell Squid that this peer does or not support Microsoft
+#			connection oriented authentication, and any such
+#			challenges received from there should be ignored.
+#			Default is auto to automatically determine the status
+#			of the peer.
+#	
+#	
+#	==== SSL / HTTPS / TLS OPTIONS ====
+#	
+#	ssl		Encrypt connections to this peer with SSL/TLS.
+#	
+#	sslcert=/path/to/ssl/certificate
+#			A client SSL certificate to use when connecting to
+#			this peer.
+#	
+#	sslkey=/path/to/ssl/key
+#			The private SSL key corresponding to sslcert above.
+#			If 'sslkey' is not specified 'sslcert' is assumed to
+#			reference a combined file containing both the
+#			certificate and the key.
+#	
+#	sslversion=1|2|3|4
+#			The SSL version to use when connecting to this peer
+#				1 = automatic (default)
+#				2 = SSL v2 only
+#				3 = SSL v3 only
+#				4 = TLS v1 only
+#	
+#	sslcipher=...	The list of valid SSL ciphers to use when connecting
+#			to this peer.
+#	
+#	ssloptions=... 	Specify various SSL engine options:
+#				NO_SSLv2  Disallow the use of SSLv2
+#				NO_SSLv3  Disallow the use of SSLv3
+#				NO_TLSv1  Disallow the use of TLSv1
+#			See src/ssl_support.c or the OpenSSL documentation for
+#			a more complete list.
+#	
+#	sslcafile=... 	A file containing additional CA certificates to use
+#			when verifying the peer certificate.
+#	
+#	sslcapath=...	A directory containing additional CA certificates to
+#			use when verifying the peer certificate.
+#	
+#	sslcrlfile=... 	A certificate revocation list file to use when
+#			verifying the peer certificate.
+#	
+#	sslflags=...	Specify various flags modifying the SSL implementation:
+#	
 #			DONT_VERIFY_PEER
 #				Accept certificates even if they fail to
 #				verify.
@@ -1376,19 +1767,54 @@ http_port 3128
 #			DONT_VERIFY_DOMAIN
 #				Don't verify the peer certificate
 #				matches the server name
-#
-#		     use ssldomain= to specify the peer name as advertised
-#		     in it's certificate. Used for verifying the correctness
-#		     of the received peer certificate. If not specified the
-#		     peer hostname will be used.
-#
-#		     use front-end-https to enable the "Front-End-Https: On"
-#		     header needed when using Squid as a SSL frontend in front
-#		     of Microsoft OWA. See MS KB document Q307347 for details
-#		     on this header. If set to auto the header will
-#		     only be added if the request is forwarded as a https://
-#		     URL.
-#
+#	
+#	ssldomain= 	The peer name as advertised in it's certificate.
+#			Used for verifying the correctness of the received peer
+#			certificate. If not specified the peer hostname will be
+#			used.
+#	
+#	front-end-https
+#			Enable the "Front-End-Https: On" header needed when
+#			using Squid as a SSL frontend in front of Microsoft OWA.
+#			See MS KB document Q307347 for details on this header.
+#			If set to auto the header will only be added if the
+#			request is forwarded as a https:// URL.
+#	
+#	
+#	==== GENERAL OPTIONS ====
+#	
+#	connect-timeout=N
+#			A peer-specific connect timeout.
+#			Also see the peer_connect_timeout directive.
+#	
+#	connect-fail-limit=N
+#			How many times connecting to a peer must fail before
+#			it is marked as down. Default is 10.
+#	
+#	allow-miss	Disable Squid's use of only-if-cached when forwarding
+#			requests to siblings. This is primarily useful when
+#			icp_hit_stale is used by the sibling. To extensive use
+#			of this option may result in forwarding loops, and you
+#			should avoid having two-way peerings with this option.
+#			For example to deny peer usage on requests from peer
+#			by denying cache_peer_access if the source is a peer.
+#	
+#	max-conn=N	Limit the amount of connections Squid may open to this
+#			peer. see also 
+#	
+#	name=xxx	Unique name for the peer.
+#			Required if you have multiple peers on the same host
+#			but different ports.
+#			This name can be used in cache_peer_access and similar
+#			directives to dentify the peer.
+#			Can be used by outgoing access controls through the
+#			peername ACL type.
+#	
+#	no-tproxy	Do not use the client-spoof TPROXY support when forwarding
+#			requests to this peer. Use normal address selection instead.
+#	
+#	proxy-only	objects fetched from the peer will not be stored locally.
+#	
 #Default:
 # none
 
@@ -1418,7 +1844,6 @@ http_port 3128
 #		* There are no defaults.
 #		* There is also a 'cache_peer_access' tag in the ACL
 #		  section.
-#
 #Default:
 # none
 
@@ -1430,8 +1855,7 @@ http_port 3128
 #
 #	The syntax is identical to 'http_access' and the other lists of
 #	ACL elements.  See the comments for 'http_access' below, or
-#	the Squid FAQ (http://www.squid-cache.org/FAQ/FAQ-10.html).
-#
+#	the Squid FAQ (http://wiki.squid-cache.org/SquidFaq/SquidAcl).
 #Default:
 # none
 
@@ -1449,7 +1873,6 @@ http_port 3128
 #	cache_peer cache.foo.org parent 3128 3130
 #	neighbor_type_domain cache.foo.org sibling .com .net
 #	neighbor_type_domain cache.foo.org sibling .au .de
-#
 #Default:
 # none
 
@@ -1468,19 +1891,25 @@ http_port 3128
 #	your time between requests is greater than this timeout, you
 #	will see a lot of requests sent DIRECT to origin servers
 #	instead of to your parents.
-#
 #Default:
 # dead_peer_timeout 10 seconds
 
+#  TAG: forward_max_tries
+#	Controls how many different forward paths Squid will try
+#	before giving up. See also forward_timeout.
+#Default:
+# forward_max_tries 10
+
 #  TAG: hierarchy_stoplist
 #	A list of words which, if found in a URL, cause the object to
 #	be handled directly by this cache.  In other words, use this
 #	to not query neighbor caches for certain objects.  You may
 #	list this option multiple times.
 #	Note: never_direct overrides this option.
-#We recommend you to use at least the following line.
-hierarchy_stoplist cgi-bin ?
+#
 
+# We recommend you to use at least the following line.
+hierarchy_stoplist cgi-bin ?
 
 # MEMORY CACHE OPTIONS
 # -----------------------------------------------------------------------------
@@ -1515,29 +1944,25 @@ hierarchy_stoplist cgi-bin ?
 #	decreases, blocks will be freed until the high-water mark is
 #	reached.  Thereafter, blocks will be used to store hot
 #	objects.
-#
 #Default:
-# cache_mem 8 MB
+# cache_mem 256 MB
 
 #  TAG: maximum_object_size_in_memory	(bytes)
 #	Objects greater than this size will not be attempted to kept in
 #	the memory cache. This should be set high enough to keep objects
 #	accessed frequently in memory to improve performance whilst low
 #	enough to keep larger objects from hoarding cache_mem.
-#
 #Default:
-# maximum_object_size_in_memory 8 KB
+# maximum_object_size_in_memory 512 KB
 
 #  TAG: memory_replacement_policy
 #	The memory replacement policy parameter determines which
 #	objects are purged from memory when memory space is needed.
 #
 #	See cache_replacement_policy for details.
-#
 #Default:
 # memory_replacement_policy lru
 
-
 # DISK CACHE OPTIONS
 # -----------------------------------------------------------------------------
 
@@ -1575,7 +2000,6 @@ hierarchy_stoplist cgi-bin ?
 #	For more information about the GDSF and LFUDA cache replacement
 #	policies see http://www.hpl.hp.com/techreports/1999/HPL-1999-69.html
 #	and http://fog.hpl.external.hp.com/techreports/98/HPL-98-173.html.
-#
 #Default:
 # cache_replacement_policy lru
 
@@ -1653,6 +2077,10 @@ hierarchy_stoplist cgi-bin ?
 #
 #	The coss store type:
 #
+#	NP: COSS filesystem in Squid-3 has been deemed too unstable for
+#	    production use and has thus been removed from this release.
+#	    We hope that it can be made usable again soon.
+#
 #	block-size=n defines the "block size" for COSS cache_dir's.
 #	Squid uses file numbers as block numbers.  Since file numbers
 #	are limited to 24 bits, the block size determines the maximum
@@ -1665,10 +2093,6 @@ hierarchy_stoplist cgi-bin ?
 #	called 'stripe' in the directory names in the config - and
 #	this will be created by squid -z.
 #
-#	The null store type:
-#
-#	no options are allowed or required
-#
 #	Common options:
 #
 #	no-store, no new objects should be stored to this cache_dir
@@ -1684,11 +2108,10 @@ hierarchy_stoplist cgi-bin ?
 #	option.
 #
 #Default:
-cache_dir ufs /var/cache/squid/ 100 16 256
+cache_dir ufs /var/cache/squid/ 256 16 256
 
 #  TAG: store_dir_select_algorithm
 #	Set this to 'round-robin' as an alternative.
-#
 #Default:
 # store_dir_select_algorithm least-load
 
@@ -1698,7 +2121,6 @@ cache_dir ufs /var/cache/squid/ 100 16 256
 #	descriptors are open.
 #
 #	A value of 0 indicates no limit.
-#
 #Default:
 # max_open_disk_fds 0
 
@@ -1706,7 +2128,6 @@ cache_dir ufs /var/cache/squid/ 100 16 256
 #	Objects smaller than this size will NOT be saved on disk.  The
 #	value is specified in kilobytes, and the default is 0 KB, which
 #	means there is no minimum.
-#
 #Default:
 # minimum_object_size 0 KB
 
@@ -1721,7 +2142,6 @@ cache_dir ufs /var/cache/squid/ 100 16 256
 #	NOTE: if using the LFUDA replacement policy you should increase
 #	this value to maximize the byte hit rate improvement of LFUDA!
 #	See replacement_policy below for a discussion of this policy.
-#
 #Default:
 # maximum_object_size 4096 KB
 
@@ -1738,12 +2158,10 @@ cache_dir ufs /var/cache/squid/ 100 16 256
 #	Defaults are 90% and 95%. If you have a large cache, 5% could be
 #	hundreds of MB. If this is the case you may wish to set these
 #	numbers closer together.
-#
 #Default:
 # cache_swap_low 90
 # cache_swap_high 95
 
-
 # LOGFILE OPTIONS
 # -----------------------------------------------------------------------------
 
@@ -1776,6 +2194,7 @@ cache_dir ufs /var/cache/squid/ 100 16 256
 #
 #	Format codes:
 #
+#		%	a literal % character
 #		>a	Client source IP address
 #		>A	Client FQDN
 #		>p	Client source port
@@ -1785,39 +2204,98 @@ cache_dir ufs /var/cache/squid/ 100 16 256
 #		ts	Seconds since epoch
 #		tu	subsecond time (milliseconds)
 #		tl	Local time. Optional strftime format argument
-#			default %d/%b/%Y:%H:%M:%S %z
+#				default %d/%b/%Y:%H:%M:%S %z
 #		tg	GMT time. Optional strftime format argument
-#			default %d/%b/%Y:%H:%M:%S %z
+#				default %d/%b/%Y:%H:%M:%S %z
 #		tr	Response time (milliseconds)
-#		>h	Request header. Optional header name argument
-#			on the format header[:[separator]element]
-#		<h	Reply header. Optional header name argument
-#			as for >h
-#		un	User name
-#		ul	User name from authentication
-#		ui	User name from ident
-#		us	User name from SSL
-#		ue	User name from external acl helper
-#		Hs	HTTP status code
-#		Ss	Squid request status (TCP_MISS etc)
-#		Sh	Squid hierarchy status (DEFAULT_PARENT etc)
-#		mt	MIME content type
-#		rm	Request method (GET/POST etc)
-#		ru	Request URL
-#		rp	Request URL-Path excluding hostname
-#		rv	Request protocol version
-#		et	Tag returned by external acl
-#		ea	Log string returned by external acl
-#		<st	Reply size including HTTP headers
-#		<sH	Reply high offset sent
-#		<sS	Upstream object size
-#		%	a literal % character
-#
-#logformat squid  %ts.%03tu %6tr %>a %Ss/%03Hs %<st %rm %ru %un %Sh/%<A %mt
-#logformat squidmime  %ts.%03tu %6tr %>a %Ss/%03Hs %<st %rm %ru %un %Sh/%<A %mt [%>h] [%<h]
-#logformat common %>a %ui %un [%tl] "%rm %ru HTTP/%rv" %Hs %<st %Ss:%Sh
-#logformat combined %>a %ui %un [%tl] "%rm %ru HTTP/%rv" %Hs %<st "%{Referer}>h" "%{User-Agent}>h" %Ss:%Sh
-#
+#		dt	Total time spent making DNS lookups (milliseconds)
+#
+#	HTTP cache related format codes:
+#
+#		[http::]>h	Original request header. Optional header name argument
+#				on the format header[:[separator]element]
+#		[http::]>ha	The HTTP request headers after adaptation and redirection. 
+#				Optional header name argument as for >h
+#		[http::]<h	Reply header. Optional header name argument
+#				as for >h
+#		[http::]un	User name
+#		[http::]ul	User name from authentication
+#		[http::]ui	User name from ident
+#		[http::]us	User name from SSL
+#		[http::]ue	User name from external acl helper
+#		[http::]>Hs	HTTP status code sent to the client
+#		[http::]<Hs	HTTP status code received from the next hop
+#		[http::]Ss	Squid request status (TCP_MISS etc)
+#		[http::]Sh	Squid hierarchy status (DEFAULT_PARENT etc)
+#		[http::]mt	MIME content type
+#		[http::]rm	Request method (GET/POST etc)
+#		[http::]ru	Request URL
+#		[http::]rp	Request URL-Path excluding hostname
+#		[http::]rv	Request protocol version
+#		[http::]et	Tag returned by external acl
+#		[http::]ea	Log string returned by external acl
+#		[http::]<st	Sent reply size including HTTP headers
+#		[http::]>st	Received request size including HTTP headers. In the
+#				case of chunked requests the chunked encoding metadata
+#				are not included
+#		[http::]>sh	Received HTTP request headers size
+#		[http::]<sh	Sent HTTP reply headers size
+#		[http::]st	Request+Reply size including HTTP headers
+#		[http::]<sH	Reply high offset sent
+#		[http::]<sS	Upstream object size
+#		[http::]<pt	Peer response time in milliseconds. The timer starts
+#				when the last request byte is sent to the next hop
+#				and stops when the last response byte is received.
+#		[http::]<tt	Total server-side time in milliseconds. The timer 
+#				starts with the first connect request (or write I/O)
+#				sent to the first selected peer. The timer stops
+#				with the last I/O with the last peer.
+#
+#	If ICAP is enabled, the following two codes become available (as
+#	well as ICAP log codes documented with the icap_log option):
+#
+#		icap::tt        Total ICAP processing time for the HTTP
+#				transaction. The timer ticks when ICAP
+#				ACLs are checked and when ICAP
+#				transaction is in progress.
+#
+#		icap::<last_h	The header of the last ICAP response
+#				related to the HTTP transaction. Like
+#				<h, accepts an optional header name
+#				argument.  Will not change semantics
+#				when multiple ICAP transactions per HTTP
+#				transaction are supported.
+#
+#	If adaptation is enabled the following two codes become available:
+#
+#		adapt::sum_trs Summed adaptation transaction response
+#				times recorded as a comma-separated list in
+#				the order of transaction start time. Each time
+#				value is recorded as an integer number,
+#				representing response time of one or more
+#				adaptation (ICAP or eCAP) transaction in
+#				milliseconds.  When a failed transaction is
+#				being retried or repeated, its time is not
+#				logged individually but added to the
+#				replacement (next) transaction. See also:
+#				adapt::all_trs.
+#
+#		adapt::all_trs All adaptation transaction response times.
+#				Same as adaptation_strs but response times of
+#				individual transactions are never added
+#				together. Instead, all transaction response
+#				times are recorded individually.
+#
+#	You can prefix adapt::*_trs format codes with adaptation
+#	service name in curly braces to record response time(s) specific
+#	to that service. For example: %{my_service}adapt::sum_trs
+#
+#	The default formats available (which do not need re-defining) are:
+#
+#logformat squid %ts.%03tu %6tr %>a %Ss/%03>Hs %<st %rm %ru %un %Sh/%<A %mt
+#logformat squidmime %ts.%03tu %6tr %>a %Ss/%03>Hs %<st %rm %ru %un %Sh/%<A %mt [%>h] [%<h]
+#logformat common %>a %ui %un [%tl] "%rm %ru HTTP/%rv" %>Hs %<st %Ss:%Sh
+#logformat combined %>a %ui %un [%tl] "%rm %ru HTTP/%rv" %>Hs %<st "%{Referer}>h" "%{User-Agent}>h" %Ss:%Sh
 #Default:
 # none
 
@@ -1843,31 +2321,121 @@ cache_dir ufs /var/cache/squid/ 100 16 256
 #
 #	And priority could be any of:
 #	err, warning, notice, info, debug.
+#
+#	Default:
+#		access_log /var/log/squid/logs/access.log squid
+#Default:
 access_log /var/log/squid/access.log squid
 
+#  TAG: icap_log
+# Note: This option is only available if Squid is rebuilt with the
+#       --enable-icap-client option
+#
+#	ICAP log files record ICAP transaction summaries, one line per
+#	transaction.
+#
+#	The icap_log option format is:
+#	icap_log <filepath> [<logformat name> [acl acl ...]]
+#	icap_log none [acl acl ...]]
+#	
+#	Please see access_log option documentation for details. The two
+#	kinds of logs share the overall configuration approach and many
+#	features.
+#
+#	ICAP processing of a single HTTP message or transaction may
+#	require multiple ICAP transactions.  In such cases, multiple
+#	ICAP transaction log lines will correspond to a single access
+#	log line.
+#
+#	ICAP log uses logformat codes that make sense for an ICAP
+#	transaction. Header-related codes are applied to the HTTP header
+#	embedded in an ICAP server response, with the following caveats:
+#	For REQMOD, there is no HTTP response header unless the ICAP
+#	server performed request satisfaction. For RESPMOD, the HTTP
+#	request header is the header sent to the ICAP server. For
+#	OPTIONS, there are no HTTP headers.
+#
+#	The following format codes are also available for ICAP logs:
+#
+#		icap::<A	ICAP server IP address. Similar to <A.
+#
+#		icap::<service_name	ICAP service name from the icap_service
+#				option in Squid configuration file.
+#
+#		icap::ru	ICAP Request-URI. Similar to ru.
+#
+#		icap::rm	ICAP request method (REQMOD, RESPMOD, or 
+#				OPTIONS). Similar to existing rm.
+#
+#		icap::>st	Bytes sent to the ICAP server (TCP payload
+#				only; i.e., what Squid writes to the socket).
+#
+#		icap::<st	Bytes received from the ICAP server (TCP
+#				payload only; i.e., what Squid reads from
+#				the socket).
+#
+#		icap::tr 	Transaction response time (in
+#				milliseconds).  The timer starts when
+#				the ICAP transaction is created and
+#				stops when the transaction is completed.
+#				Similar to tr.
+#
+#		icap::tio	Transaction I/O time (in milliseconds). The
+#				timer starts when the first ICAP request
+#				byte is scheduled for sending. The timers
+#				stops when the last byte of the ICAP response
+#				is received.
+#
+#		icap::to 	Transaction outcome: ICAP_ERR* for all
+#				transaction errors, ICAP_OPT for OPTION
+#				transactions, ICAP_ECHO for 204
+#				responses, ICAP_MOD for message
+#				modification, and ICAP_SAT for request
+#				satisfaction. Similar to Ss.
+#
+#		icap::Hs	ICAP response status code. Similar to Hs.
+#
+#		icap::>h	ICAP request header(s). Similar to >h.
+#
+#		icap::<h	ICAP response header(s). Similar to <h.
+#
+#	The default ICAP log format, which can be used without an explicit
+#	definition, is called icap_squid:
+#
+#logformat icap_squid %ts.%03tu %6icap::tr %>a %icap::to/%03icap::Hs %icap::<size %icap::rm %icap::ru% %un -/%icap::<A -
+#
+#	See also: logformat, log_icap, and %icap::<last_h 
+#Default:
+# none
+
 #  TAG: log_access	allow|deny acl acl...
 #	This options allows you to control which requests gets logged
 #	to access.log (see access_log directive). Requests denied for
 #	logging will also not be accounted for in performance counters.
 #
+#	This clause only supports fast acl types.
+#	See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details.
 #Default:
 # none
 
-#  TAG: cache_log
-#	Cache logging file. This is where general information about
-#	your cache's behavior goes. You can increase the amount of data
-#	logged to this file with the "debug_options" tag below.
+#  TAG: log_icap
+# Note: This option is only available if Squid is rebuilt with the
+#       --enable-icap-client option
 #
+#	This options allows you to control which requests get logged
+#	to icap.log. See the icap_log directive for ICAP log details.
 #Default:
 cache_log /var/log/squid/cache.log
 
 #  TAG: cache_store_log
 #	Logs the activities of the storage manager.  Shows which
 #	objects are ejected from the cache, and which objects are
-#	saved and for how long.  To disable, enter "none". There are
-#	not really utilities to analyze this data, so you can safely
+#	saved and for how long.  To disable, enter "none" or remove the line.
+#	There are not really utilities to analyze this data, so you can safely
 #	disable it.
 #
+#	Example:
+#		cache_store_log /var/log/squid/logs/store.log
 #Default:
 cache_store_log /var/log/squid/store.log
 
@@ -1899,7 +2467,6 @@ cache_store_log /var/log/squid/store.log
 #	the correct 'cache_dir' entry (unless you manually rename
 #	them).  We recommend you do NOT use this option.  It is
 #	better to keep these index files in each 'cache_dir' directory.
-#
 #Default:
 # none
 
@@ -1918,6 +2485,8 @@ cache_store_log /var/log/squid/store.log
 #	in the habit of using 'squid -k rotate' instead of 'kill -USR1
 #	<pid>'.
 #
+#	Note, from Squid-3.1 this option has no effect on the cache.log,
+#	that log can be rotated separately by using debug_options
 #Default:
 logfile_rotate 0
 
@@ -1927,7 +2496,6 @@ logfile_rotate 0
 #	emulate_httpd_log to 'off' or 'on'.  The default
 #	is to use the native log format since it includes useful
 #	information Squid-specific log analyzers use.
-#
 #Default:
 # emulate_httpd_log off
 
@@ -1935,7 +2503,6 @@ logfile_rotate 0
 #	Log the destination IP address in the hierarchy log tag when going
 #	direct. Earlier Squid versions logged the hostname here. If you
 #	prefer the old way set this to off.
-#
 #Default:
 # log_ip_on_direct on
 
@@ -1943,7 +2510,6 @@ logfile_rotate 0
 #	Pathname to Squid's MIME table. You shouldn't need to change
 #	this, but the default file contains examples and formatting
 #	information if you do.
-#
 #Default:
 # mime_table /etc/squid/mime.conf
 
@@ -1953,7 +2519,6 @@ logfile_rotate 0
 #	safely and will appear as two bracketed fields at the end of
 #	the access log (for either the native or httpd-emulated log
 #	formats).  To enable this logging set log_mime_hdrs to 'on'.
-#
 #Default:
 # log_mime_hdrs off
 
@@ -1964,7 +2529,6 @@ logfile_rotate 0
 #	Squid will write the User-Agent field from HTTP requests
 #	to the filename specified here.  By default useragent_log
 #	is disabled.
-#
 #Default:
 # none
 
@@ -1977,13 +2541,11 @@ logfile_rotate 0
 #	Note that "referer" is actually a misspelling of "referrer"
 #	however the misspelt version has been accepted into the HTTP RFCs
 #	and we accept both.
-#
 #Default:
 # none
 
 #  TAG: pid_filename
 #	A filename to write the process-id to.  To disable, enter "none".
-#
 #Default:
 pid_filename /var/run/squid/squid.pid
 
@@ -2004,7 +2566,6 @@ pid_filename /var/run/squid/squid.pid
 #	IP's connecting to it. This can (in some situations) increase
 #	latency, which makes your cache seem slower for interactive
 #	browsing.
-#
 #Default:
 # log_fqdn off
 
@@ -2013,9 +2574,8 @@ pid_filename /var/run/squid/squid.pid
 #	Change this to protect the privacy of your cache clients.
 #	A netmask of 255.255.255.0 will log all IP's in that range with
 #	the last digit set to '0'.
-#
 #Default:
-# client_netmask 255.255.255.255
+# client_netmask no_addr
 
 #  TAG: forward_log
 # Note: This option is only available if Squid is rebuilt with the
@@ -2024,14 +2584,12 @@ pid_filename /var/run/squid/squid.pid
 #	Logs the server-side requests.
 #
 #	This is currently work in progress.
-#
 #Default:
 # none
 
 #  TAG: strip_query_terms
 #	By default, Squid strips query terms from requested URLs before
 #	logging.  This protects your user's privacy.
-#
 #Default:
 # strip_query_terms on
 
@@ -2041,10 +2599,54 @@ pid_filename /var/run/squid/squid.pid
 #	Buffering it can speed up the writing slightly (though you are
 #	unlikely to need to worry unless you run with tons of debugging
 #	enabled in which case performance will suffer badly anyway..).
-#
 #Default:
 # buffered_logs off
 
+#  TAG: netdb_filename
+# Note: This option is only available if Squid is rebuilt with the
+#       --enable-icmp option
+#
+#	A filename where Squid stores it's netdb state between restarts.
+#	To disable, enter "none".
+#Default:
+# netdb_filename /var/log/squid/logs/netdb.state
+
+# OPTIONS FOR TROUBLESHOOTING
+# -----------------------------------------------------------------------------
+
+#  TAG: cache_log
+#	Cache logging file. This is where general information about
+#	your cache's behavior goes. You can increase the amount of data
+#	logged to this file and how often its rotated with "debug_options"
+#Default:
+cache_log /var/log/squid/cache.log
+
+#  TAG: debug_options
+#	Logging options are set as section,level where each source file
+#	is assigned a unique section.  Lower levels result in less
+#	output,  Full debugging (level 9) can result in a very large
+#	log file, so be careful.
+#
+#	The magic word "ALL" sets debugging levels for all sections.
+#	We recommend normally running with "ALL,1".
+#
+#	The rotate=N option can be used to keep more or less of these logs
+#	than would otherwise be kept by logfile_rotate.
+#	For most uses a single log should be enough to monitor current
+#	events affecting Squid.
+#Default:
+# debug_options ALL,1
+
+#  TAG: coredump_dir
+#	By default Squid leaves core files in the directory from where
+#	it was started. If you set 'coredump_dir' to a directory
+#	that exists, Squid will chdir() to that directory at startup
+#	and coredump files will be left there.
+#
+#Default:
+# coredump_dir none
+#
+
 
 # OPTIONS FOR FTP GATEWAYING
 # -----------------------------------------------------------------------------
@@ -2059,7 +2661,6 @@ pid_filename /var/run/squid/squid.pid
 #	depending on how the cache is used.
 #	Some ftp server also validate the email address is valid
 #	(for example perl.com).
-#
 #Default:
 # ftp_user Squid@
 
@@ -2067,7 +2668,6 @@ pid_filename /var/run/squid/squid.pid
 #	Sets the width of ftp listings. This should be set to fit in
 #	the width of a standard browser. Setting this too small
 #	can cut off long filenames when browsing ftp sites.
-#
 #Default:
 # ftp_list_width 32
 
@@ -2075,16 +2675,51 @@ pid_filename /var/run/squid/squid.pid
 #	If your firewall does not allow Squid to use passive
 #	connections, turn off this option.
 #
+#	Use of ftp_epsv_all option requires this to be ON.
 #Default:
 # ftp_passive on
 
+#  TAG: ftp_epsv_all
+#	FTP Protocol extensions permit the use of a special "EPSV ALL" command.
+#
+#	NATs may be able to put the connection on a "fast path" through the
+#	translator, as the EPRT command will never be used and therefore,
+#	translation of the data portion of the segments will never be needed.
+#
+#	When a client only expects to do two-way FTP transfers this may be
+#	useful.
+#	If squid finds that it must do a three-way FTP transfer after issuing
+#	an EPSV ALL command, the FTP session will fail.
+#
+#	If you have any doubts about this option do not use it.
+#	Squid will nicely attempt all other connection methods.
+#
+#	Requires ftp_passive to be ON (default) for any effect.
+#Default:
+# ftp_epsv_all off
+
+#  TAG: ftp_epsv
+#	FTP Protocol extensions permit the use of a special "EPSV" command.
+#
+#	NATs may be able to put the connection on a "fast path" through the
+#	translator using EPSV, as the EPRT command will never be used
+#	and therefore, translation of the data portion of the segments 
+#	will never be needed.
+#
+#	Turning this OFF will prevent EPSV being attempted.
+#	WARNING: Doing so will convert Squid back to the old behavior with all
+#	the related problems with external NAT devices/layers.
+#
+#	Requires ftp_passive to be ON (default) for any effect.
+#Default:
+# ftp_epsv on
+
 #  TAG: ftp_sanitycheck
 #	For security and data integrity reasons Squid by default performs
 #	sanity checks of the addresses of FTP data connections ensure the
 #	data connection is to the requested server. If you need to allow
 #	FTP connections to servers using another IP address for the data
 #	connection turn this off.
-#
 #Default:
 # ftp_sanitycheck on
 
@@ -2099,11 +2734,9 @@ pid_filename /var/run/squid/squid.pid
 #	try setting this directive to off. If that helps, report to the
 #	operator of the FTP server in question that their FTP server
 #	is broken and does not follow the FTP standard.
-#
 #Default:
 # ftp_telnet_protocol on
 
-
 # OPTIONS FOR EXTERNAL SUPPORT PROGRAMS
 # -----------------------------------------------------------------------------
 
@@ -2111,13 +2744,11 @@ pid_filename /var/run/squid/squid.pid
 #	Specify the location of the diskd executable.
 #	Note this is only useful if you have compiled in
 #	diskd as one of the store io modules.
-#
 #Default:
 # diskd_program /usr/libexec/diskd
 
 #  TAG: unlinkd_program
 #	Specify the location of the executable for file deletion process.
-#
 #Default:
 # unlinkd_program /usr/libexec/unlinkd
 
@@ -2126,10 +2757,18 @@ pid_filename /var/run/squid/squid.pid
 #       --enable-icmp option
 #
 #	Specify the location of the executable for the pinger process.
-#
 #Default:
 # pinger_program /usr/libexec/pinger
 
+#  TAG: pinger_enable
+# Note: This option is only available if Squid is rebuilt with the
+#       --enable-icmp option
+#
+#	Control whether the pinger is active at run-time.
+#	Enables turning ICMP pinger on and off with a simple
+#	squid -k reconfigure.
+#Default:
+# pinger_enable off
 
 # OPTIONS FOR URL REWRITING
 # -----------------------------------------------------------------------------
@@ -2155,7 +2794,6 @@ pid_filename /var/run/squid/squid.pid
 #	URL with "301:" (moved permanently) or 302: (moved temporarily).
 #
 #	By default, a URL rewriter is not used.
-#
 #Default:
 # none
 
@@ -2164,7 +2802,6 @@ pid_filename /var/run/squid/squid.pid
 #	too few Squid will have to wait for them to process a backlog of
 #	URLs, slowing it down. If you start too many they will use RAM
 #	and other system resources.
-#
 #Default:
 # url_rewrite_children 5
 
@@ -2173,6 +2810,11 @@ pid_filename /var/run/squid/squid.pid
 #	parallel. Defaults to 0 which indicates the redirector
 #	is a old-style single threaded redirector.
 #
+#	When this directive is set to a value >= 1 then the protocol
+#	used to communicate with the helper is modified to include
+#	a request ID in front of the request/response. The request
+#	ID from the request must be echoed back with the response
+#	to that request.
 #Default:
 # url_rewrite_concurrency 0
 
@@ -2183,7 +2825,6 @@ pid_filename /var/run/squid/squid.pid
 #
 #	WARNING: Entries are cached on the result of the URL rewriting
 #	process, so be careful if you have domain-virtual hosts.
-#
 #Default:
 # url_rewrite_host_header on
 
@@ -2192,6 +2833,8 @@ pid_filename /var/run/squid/squid.pid
 #	sent to the redirector processes.  By default all requests
 #	are sent.
 #
+#	This clause supports both fast and slow acl types.
+#	See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details.
 #Default:
 # none
 
@@ -2205,26 +2848,26 @@ pid_filename /var/run/squid/squid.pid
 #	redirectors for access control, and you enable this option,
 #	users may have access to pages they should not
 #	be allowed to request.
-#
 #Default:
 # url_rewrite_bypass off
 
-
 # OPTIONS FOR TUNING THE CACHE
 # -----------------------------------------------------------------------------
 
 #  TAG: cache
-#	A list of ACL elements which, if matched, cause the request to
+#	A list of ACL elements which, if matched and denied, cause the request to
 #	not be satisfied from the cache and the reply to not be cached.
 #	In other words, use this to force certain objects to never be cached.
 #
-#	You must use the word 'DENY' to indicate the ACL names which should
-#	NOT be cached.
+#	You must use the words 'allow' or 'deny' to indicate whether items
+#	matching the ACL should be allowed or denied into the cache.
 #
-#	Default is to allow all to be cached
-#We recommend you to use the following two lines.
-acl QUERY urlpath_regex cgi-bin \?
-cache deny QUERY
+#	Default is to allow all to be cached.
+#
+#	This clause supports both fast and slow acl types.
+#	See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details.
+#Default:
+# none
 
 #  TAG: refresh_pattern
 #	usage: refresh_pattern [-i] regex min percent max [options]
@@ -2251,14 +2894,21 @@ cache deny QUERY
 #		 ignore-reload
 #		 ignore-no-cache
 #		 ignore-no-store
+#		 ignore-must-revalidate
 #		 ignore-private
 #		 ignore-auth
 #		 refresh-ims
 #
 #		override-expire enforces min age even if the server
-#		sent a Expires: header. Doing this VIOLATES the HTTP
-#		standard.  Enabling this feature could make you liable
-#		for problems which it causes.
+#		sent an explicit expiry time (e.g., with the
+#		Expires: header or Cache-Control: max-age). Doing this
+#		VIOLATES the HTTP standard.  Enabling this feature
+#		could make you liable for problems which it causes.
+#
+#		Note: override-expire does not enforce staleness - it only extends
+#		freshness / min. If the server returns a Expires time which
+#		is longer than your max time, Squid will still consider
+#		the object fresh for that period of time.
 #
 #		override-lastmod enforces min age even on objects
 #		that were modified recently.
@@ -2284,6 +2934,11 @@ cache deny QUERY
 #		the HTTP standard. Enabling this feature could make you
 #		liable for problems which it causes.
 #
+#		ignore-must-revalidate ignores any ``Cache-Control: must-revalidate``
+#		headers received from a server. Doing this VIOLATES
+#		the HTTP standard. Enabling this feature could make you
+#		liable for problems which it causes.
+#
 #		ignore-private ignores any ``Cache-control: private''
 #		headers received from a server. Doing this VIOLATES
 #		the HTTP standard. Enabling this feature could make you
@@ -2316,9 +2971,12 @@ cache deny QUERY
 #	to change one. The default setting is only active if none is
 #	used.
 #
-#Suggested default:
+#
+
+# Add any of your own refresh_pattern entries above these.
 refresh_pattern ^ftp:		1440	20%	10080
 refresh_pattern ^gopher:	1440	0%	1440
+refresh_pattern -i (/cgi-bin/|\?) 0	0%	0
 refresh_pattern .		0	20%	4320
 
 #  TAG: quick_abort_min	(KB)
@@ -2350,7 +3008,6 @@ refresh_pattern .		0	20%	4320
 #
 #	If you want retrievals to always continue if they are being
 #	cached set 'quick_abort_min' to '-1 KB'.
-#
 #Default:
 # quick_abort_min 16 KB
 # quick_abort_max 16 KB
@@ -2359,25 +3016,29 @@ refresh_pattern .		0	20%	4320
 #  TAG: read_ahead_gap	buffer-size
 #	The amount of data the cache will buffer ahead of what has been
 #	sent to the client when retrieving an object from another server.
-#
 #Default:
 # read_ahead_gap 16 KB
 
 #  TAG: negative_ttl	time-units
-#	Time-to-Live (TTL) for failed requests.  Certain types of
-#	failures (such as "connection refused" and "404 Not Found") are
-#	negatively-cached for a configurable amount of time.  The
-#	default is 5 minutes.  Note that this is different from
-#	negative caching of DNS lookups.
+#	Set the Default Time-to-Live (TTL) for failed requests.
+#	Certain types of failures (such as "connection refused" and
+#	"404 Not Found") are able to be negatively-cached for a short time.
+#	Modern web servers should provide Expires: header, however if they
+#	do not this can provide a minimum TTL.
+#	The default is not to cache errors with unknown expiry details.
+#
+#	Note that this is different from negative caching of DNS lookups.
 #
+#	WARNING: Doing this VIOLATES the HTTP standard.  Enabling
+#	this feature could make you liable for problems which it
+#	causes.
 #Default:
-# negative_ttl 5 minutes
+# negative_ttl 0 seconds
 
 #  TAG: positive_dns_ttl	time-units
 #	Upper limit on how long Squid will cache positive DNS responses.
 #	Default is 6 hours (360 minutes). This directive must be set
 #	larger than negative_dns_ttl.
-#
 #Default:
 # positive_dns_ttl 6 hours
 
@@ -2386,7 +3047,6 @@ refresh_pattern .		0	20%	4320
 #	This also sets the lower cache limit on positive lookups.
 #	Minimum value is 1 second, and it is not recommendable to go
 #	much below 10 seconds.
-#
 #Default:
 # negative_dns_ttl 1 minutes
 
@@ -2400,32 +3060,34 @@ refresh_pattern .		0	20%	4320
 #	from making Squid fetch the whole object up to that point before
 #	sending anything to the client.
 #
-#	A value of -1 causes Squid to always fetch the object from the
-#	beginning so it may cache the result. (2.0 style)
-#
 #	A value of 0 causes Squid to never fetch more than the
 #	client requested. (default)
 #
+#	A value of -1 causes Squid to always fetch the object from the
+#	beginning so it may cache the result. (2.0 style)
+#
+#	NP: Using -1 here will override any quick_abort settings that may
+#	    otherwise apply to the range request. The range request will
+#	    be fully fetched from start to finish regardless of the client
+#	    actions. This affects bandwidth usage.
 #Default:
 # range_offset_limit 0 KB
 
 #  TAG: minimum_expiry_time	(seconds)
 #	The minimum caching time according to (Expires - Date)
 #	Headers Squid honors if the object can't be revalidated
-#	defaults to 60 seconds. In reverse proxy enorinments it
+#	defaults to 60 seconds. In reverse proxy environments it
 #	might be desirable to honor shorter object lifetimes. It
 #	is most likely better to make your server return a
 #	meaningful Last-Modified header however. In ESI environments
 #	where page fragments often have short lifetimes, this will
 #	often be best set to 0.
-#
 #Default:
 # minimum_expiry_time 60 seconds
 
 #  TAG: store_avg_object_size	(kbytes)
 #	Average object size, used to estimate number of objects your
 #	cache can hold.  The default is 13 KB.
-#
 #Default:
 # store_avg_object_size 13 KB
 
@@ -2433,11 +3095,9 @@ refresh_pattern .		0	20%	4320
 #	Target number of objects per bucket in the store hash table.
 #	Lowering this value increases the total number of buckets and
 #	also the storage maintenance rate.  The default is 20.
-#
 #Default:
 # store_objects_per_bucket 20
 
-
 # HTTP OPTIONS
 # -----------------------------------------------------------------------------
 
@@ -2447,9 +3107,8 @@ refresh_pattern .		0	20%	4320
 #	Placing a limit on the request header size will catch certain
 #	bugs (for example with persistent connections) and possibly
 #	buffer-overflow or denial-of-service attacks.
-#
 #Default:
-# request_header_max_size 20 KB
+# request_header_max_size 64 KB
 
 #  TAG: reply_header_max_size	(KB)
 #	This specifies the maximum size for HTTP headers in a reply.
@@ -2457,9 +3116,8 @@ refresh_pattern .		0	20%	4320
 #	Placing a limit on the reply header size will catch certain
 #	bugs (for example with persistent connections) and possibly
 #	buffer-overflow or denial-of-service attacks.
-#
 #Default:
-# reply_header_max_size 20 KB
+# reply_header_max_size 64 KB
 
 #  TAG: request_body_max_size	(bytes)
 #	This specifies the maximum size for an HTTP request body.
@@ -2468,10 +3126,32 @@ refresh_pattern .		0	20%	4320
 #	than this limit receives an "Invalid Request" error message.
 #	If you set this parameter to a zero (the default), there will
 #	be no limit imposed.
-#
 #Default:
 # request_body_max_size 0 KB
 
+#  TAG: chunked_request_body_max_size	(bytes)
+#	A broken or confused HTTP/1.1 client may send a chunked HTTP
+#	request to Squid. Squid does not have full support for that
+#	feature yet. To cope with such requests, Squid buffers the
+#	entire request and then dechunks request body to create a
+#	plain HTTP/1.0 request with a known content length. The plain
+#	request is then used by the rest of Squid code as usual.
+#
+#	The option value specifies the maximum size of the buffer used
+#	to hold the request before the conversion. If the chunked
+#	request size exceeds the specified limit, the conversion
+#	fails, and the client receives an "unsupported request" error,
+#	as if dechunking was disabled.
+#
+#	Dechunking is enabled by default. To disable conversion of
+#	chunked requests, set the maximum to zero.
+#
+#	Request dechunking feature and this option in particular are a
+#	temporary hack. When chunking requests and responses are fully
+#	supported, there will be no need to buffer a chunked request.
+#Default:
+# chunked_request_body_max_size 64 KB
+
 #  TAG: broken_posts
 #	A list of ACL elements which, if matched, causes Squid to send
 #	an extra CRLF pair after the body of a PUT/POST request.
@@ -2486,17 +3166,29 @@ refresh_pattern .		0	20%	4320
 #	  forbidden by the BNF, an HTTP/1.1 client must not preface or follow
 #	  a request with an extra CRLF.
 #
+#	This clause only supports fast acl types.
+#	See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details.
+#
 #Example:
 # acl buggy_server url_regex ^http://....
 # broken_posts allow buggy_server
-#
 #Default:
 # none
 
+#  TAG: icap_uses_indirect_client	on|off
+# Note: This option is only available if Squid is rebuilt with the
+#       --enable-follow-x-forwarded-for and --enable-icap-client option
+#
+#   Controls whether the indirect client address
+#   (see follow_x_forwarded_for) instead of the
+#   direct client address is passed to an ICAP
+#   server as "X-Client-IP".
+#Default:
+# icap_uses_indirect_client on
+
 #  TAG: via	on|off
 #	If set (default), Squid will include a Via header in requests and
 #	replies as required by RFC2616.
-#
 #Default:
 # via on
 
@@ -2517,7 +3209,6 @@ refresh_pattern .		0	20%	4320
 #	the old Squid behavior, which is better for hit ratios but
 #	worse for clients using IE, if they need to be able to
 #	force fresh content.
-#
 #Default:
 # ie_refresh off
 
@@ -2527,19 +3218,12 @@ refresh_pattern .		0	20%	4320
 #	when requested by a HTTP/1.0 client. This option
 #	enables Squid to ignore such expiry times until
 #	HTTP/1.1 is fully implemented.
-#	WARNING: This may eventually cause some varying
-#	objects not intended for caching to get cached.
 #
+#	WARNING: If turned on this may eventually cause some
+#	varying objects not intended for caching to get cached.
 #Default:
 # vary_ignore_expire off
 
-#  TAG: extension_methods
-#	Squid only knows about standardized HTTP request methods.
-#	You can add up to 20 additional "extension" methods here.
-#
-#Default:
-# none
-
 #  TAG: request_entities
 #	Squid defaults to deny GET and HEAD requests with request entities,
 #	as the meaning of such requests are undefined in the HTTP standard
@@ -2550,7 +3234,6 @@ refresh_pattern .		0	20%	4320
 #	that there is server software (both proxies and web servers) which
 #	can fail to properly process this kind of request which may make you
 #	vulnerable to cache pollution attacks if enabled.
-#
 #Default:
 # request_entities off
 
@@ -2620,7 +3303,6 @@ refresh_pattern .		0	20%	4320
 #
 #	By default, all headers are allowed (no anonymizing is
 #	performed).
-#
 #Default:
 # none
 
@@ -2693,7 +3375,6 @@ refresh_pattern .		0	20%	4320
 #
 #	By default, all headers are allowed (no anonymizing is
 #	performed).
-#
 #Default:
 # none
 
@@ -2709,7 +3390,6 @@ refresh_pattern .		0	20%	4320
 #	This only applies to request headers, not reply headers.
 #
 #	By default, headers are removed if denied.
-#
 #Default:
 # none
 
@@ -2725,10 +3405,18 @@ refresh_pattern .		0	20%	4320
 #
 #	If set to "off" then such HTTP errors will cause the request
 #	or response to be rejected.
-#
 #Default:
 # relaxed_header_parser on
 
+#  TAG: ignore_expect_100	on|off
+#	This option makes Squid ignore any Expect: 100-continue header present
+#	in the request. RFC 2616 requires that Squid being unable to satisfy
+#	the response expectation MUST return a 417 error.
+#
+#	Note: Enabling this is a HTTP protocol violation, but some clients may
+#	not handle it well..
+#Default:
+# ignore_expect_100 off
 
 # TIMEOUTS
 # -----------------------------------------------------------------------------
@@ -2736,7 +3424,6 @@ refresh_pattern .		0	20%	4320
 #  TAG: forward_timeout	time-units
 #	This parameter specifies how long Squid should at most attempt in
 #	finding a forwarding path for the request before giving up.
-#
 #Default:
 # forward_timeout 4 minutes
 
@@ -2744,7 +3431,6 @@ refresh_pattern .		0	20%	4320
 #	This parameter specifies how long to wait for the TCP connect to
 #	the requested server or peer to complete before Squid should
 #	attempt to find another path where to forward the request.
-#
 #Default:
 # connect_timeout 1 minute
 
@@ -2753,7 +3439,6 @@ refresh_pattern .		0	20%	4320
 #	connection to a peer cache.  The default is 30 seconds.   You
 #	may also set different timeout values for individual neighbors
 #	with the 'connect-timeout' option on a 'cache_peer' line.
-#
 #Default:
 # peer_connect_timeout 30 seconds
 
@@ -2763,21 +3448,18 @@ refresh_pattern .		0	20%	4320
 #	amount.  If no data is read again after this amount of time,
 #	the request is aborted and logged with ERR_READ_TIMEOUT.  The
 #	default is 15 minutes.
-#
 #Default:
 # read_timeout 15 minutes
 
 #  TAG: request_timeout
 #	How long to wait for an HTTP request after initial
 #	connection establishment.
-#
 #Default:
 # request_timeout 5 minutes
 
 #  TAG: persistent_request_timeout
 #	How long to wait for the next HTTP request on a persistent
 #	connection after the previous request completes.
-#
 #Default:
 # persistent_request_timeout 2 minutes
 
@@ -2796,7 +3478,6 @@ refresh_pattern .		0	20%	4320
 #	If you seem to have many client connections tying up
 #	filedescriptors, we recommend first tuning the read_timeout,
 #	request_timeout, persistent_request_timeout and quick_abort values.
-#
 #Default:
 # client_lifetime 1 day
 
@@ -2804,19 +3485,21 @@ refresh_pattern .		0	20%	4320
 #	Some clients may shutdown the sending side of their TCP
 #	connections, while leaving their receiving sides open.	Sometimes,
 #	Squid can not tell the difference between a half-closed and a
-#	fully-closed TCP connection.  By default, half-closed client
-#	connections are kept open until a read(2) or write(2) on the
-#	socket returns an error.  Change this option to 'off' and Squid
-#	will immediately close client connections when read(2) returns
-#	"no more data to read."
+#	fully-closed TCP connection.
+#
+#	By default, Squid will immediately close client connections when
+#	read(2) returns "no more data to read."
 #
+#	Change this option to 'on' and Squid will keep open connections
+#	until a read(2) or write(2) on the socket returns an error.
+#	This may show some benefits for reverse proxies. But if not
+#	it is recommended to leave OFF.
 #Default:
-# half_closed_clients on
+# half_closed_clients off
 
 #  TAG: pconn_timeout
 #	Timeout for idle persistent connections to servers and other
 #	proxies.
-#
 #Default:
 # pconn_timeout 1 minute
 
@@ -2826,7 +3509,6 @@ refresh_pattern .		0	20%	4320
 #	If this is too high, and you enabled IDENT lookups from untrusted
 #	users, you might be susceptible to denial-of-service by having
 #	many ident requests going at once.
-#
 #Default:
 # ident_timeout 10 seconds
 
@@ -2836,18 +3518,15 @@ refresh_pattern .		0	20%	4320
 #	This value is the lifetime to set for all open descriptors
 #	during shutdown mode.  Any active clients after this many
 #	seconds will receive a 'timeout' message.
-#
 #Default:
 # shutdown_lifetime 30 seconds
 
-
 # ADMINISTRATIVE PARAMETERS
 # -----------------------------------------------------------------------------
 
 #  TAG: cache_mgr
 #	Email-address of local cache manager who will receive
 #	mail if the cache dies.  The default is "webmaster."
-#
 #Default:
 # cache_mgr webmaster
 
@@ -2856,7 +3535,6 @@ refresh_pattern .		0	20%	4320
 #	The default is to use 'appname@unique_hostname'.
 #	Default appname value is "squid", can be changed into
 #	src/globals.h before building squid.
-#
 #Default:
 # none
 
@@ -2867,7 +3545,6 @@ refresh_pattern .		0	20%	4320
 #	  mail-program recipient < mailfile
 #
 #	Optional command line options can be specified.
-#
 #Default:
 # mail_program mail
 
@@ -2876,7 +3553,6 @@ refresh_pattern .		0	20%	4320
 #	UID/GID to the user specified below.  The default is to change
 #	to UID of nobody.
 #	see also; cache_effective_group
-#
 #Default:
 cache_effective_user nobody
 
@@ -2896,13 +3572,11 @@ cache_effective_user nobody
 #	This option is not recommended by the Squid Team.
 #	Our preference is for administrators to configure a secure
 #	user account for squid with UID/GID matching system policies.
-#
 #Default:
 cache_effective_group nobody
 
 #  TAG: httpd_suppress_version_string	on|off
 #	Suppress Squid version string info in HTTP headers and HTML error pages.
-#
 #Default:
 # httpd_suppress_version_string off
 
@@ -2912,7 +3586,6 @@ cache_effective_group nobody
 #	will be used. If you have multiple caches in a cluster and
 #	get errors about IP-forwarding you must set them to have individual
 #	names with this setting.
-#
 #Default:
 # none
 
@@ -2920,16 +3593,22 @@ cache_effective_group nobody
 #	If you want to have multiple machines with the same
 #	'visible_hostname' you must give each machine a different
 #	'unique_hostname' so forwarding loops can be detected.
-#
 #Default:
 # none
 
 #  TAG: hostname_aliases
 #	A list of other DNS names your cache has.
-#
 #Default:
 # none
 
+#  TAG: umask
+#	Minimum umask which should be enforced while the proxy
+#	is running, in addition to the umask set at startup.
+#
+#	For a traditional octal representation of umasks, start
+#        your value with 0.
+#Default:
+# umask 027
 
 # OPTIONS FOR THE CACHE REGISTRATION SERVICE
 # -----------------------------------------------------------------------------
@@ -2958,14 +3637,12 @@ cache_effective_group nobody
 #	default is `0' which disables sending the announcement
 #	messages.
 #
-#	To enable announcing your cache, just uncomment the line
-#	below.
+#	To enable announcing your cache, just set an announce period.
 #
+#	Example:
+#		announce_period 1 day
 #Default:
 # announce_period 0
-#
-#To enable announcing your cache, just uncomment the line below.
-#announce_period 1 day
 
 #  TAG: announce_host
 #  TAG: announce_file
@@ -2977,49 +3654,43 @@ cache_effective_group nobody
 #	default default to 3131.  If the 'filename' argument is given,
 #	the contents of that file will be included in the announce
 #	message.
-#
 #Default:
 # announce_host tracker.ircache.net
 # announce_port 3131
 
-
 # HTTPD-ACCELERATOR OPTIONS
 # -----------------------------------------------------------------------------
 
 #  TAG: httpd_accel_surrogate_id
 # Note: This option is only available if Squid is rebuilt with the
-#       -DUSE_SQUID_ESI define
+#       --enable-esi option
 #
 #	Surrogates (http://www.esi.org/architecture_spec_1.0.html)
 #	need an identification token to allow control targeting. Because
 #	a farm of surrogates may all perform the same tasks, they may share
 #	an identification token.
-#
 #Default:
 # httpd_accel_surrogate_id unset-id
 
 #  TAG: http_accel_surrogate_remote	on|off
 # Note: This option is only available if Squid is rebuilt with the
-#       -DUSE_SQUID_ESI define
+#       --enable-esi option
 #
 #	Remote surrogates (such as those in a CDN) honour Surrogate-Control: no-store-remote.
 #	Set this to on to have squid behave as a remote surrogate.
-#
 #Default:
 # http_accel_surrogate_remote off
 
 #  TAG: esi_parser	libxml2|expat|custom
 # Note: This option is only available if Squid is rebuilt with the
-#       -DUSE_SQUID_ESI define
+#       --enable-esi option
 #
 #	ESI markup is not strictly XML compatible. The custom ESI parser
 #	will give higher performance, but cannot handle non ASCII character
 #	encodings.
-#
 #Default:
 # esi_parser custom
 
-
 # DELAY POOL PARAMETERS
 # -----------------------------------------------------------------------------
 
@@ -3030,7 +3701,6 @@ cache_effective_group nobody
 #	This represents the number of delay pools to be used.  For example,
 #	if you have one class 2 delay pool and one class 3 delays pool, you
 #	have a total of 2 delay pools.
-#
 #Default:
 # delay_pools 0
 
@@ -3043,12 +3713,12 @@ cache_effective_group nobody
 #	delay pools, one of class 2 and one of class 3, the settings above
 #	and here would be:
 #
-#Example:
-# delay_pools 4      # 4 delay pools
-# delay_class 1 2    # pool 1 is a class 2 pool
-# delay_class 2 3    # pool 2 is a class 3 pool
-# delay_class 3 4    # pool 3 is a class 4 pool
-# delay_class 4 5    # pool 4 is a class 5 pool
+#	Example:
+#	    delay_pools 4      # 4 delay pools
+#	    delay_class 1 2    # pool 1 is a class 2 pool
+#	    delay_class 2 3    # pool 2 is a class 3 pool
+#	    delay_class 3 4    # pool 3 is a class 4 pool
+#	    delay_class 4 5    # pool 4 is a class 5 pool
 #
 #	The delay pool classes are:
 #
@@ -3057,13 +3727,13 @@ cache_effective_group nobody
 #
 #		class 2 	Everything is limited by a single aggregate
 #				bucket as well as an "individual" bucket chosen
-#				from bits 25 through 32 of the IP address.
+#				from bits 25 through 32 of the IPv4 address.
 #
 #		class 3		Everything is limited by a single aggregate
 #				bucket as well as a "network" bucket chosen
 #				from bits 17 through 24 of the IP address and a
 #				"individual" bucket chosen from bits 17 through
-#				32 of the IP address.
+#				32 of the IPv4 address.
 #
 #		class 4		Everything in a class 3 delay pool, with an
 #				additional limit on a per user basis. This
@@ -3079,6 +3749,8 @@ cache_effective_group nobody
 #		-> bits 17 through 24 are "c"
 #		-> bits 17 through 32 are "c * 256 + d"
 #
+#	NOTE-2: Due to the use of bitmasks in class 2,3,4 pools they only apply to
+#		IPv4 traffic. Class 1 and 5 pools may be used with IPv6 traffic.
 #Default:
 # none
 
@@ -3102,7 +3774,6 @@ cache_effective_group nobody
 # delay_access 2 allow lotsa_little_clients
 # delay_access 2 deny all
 # delay_access 3 allow authenticated_clients
-#
 #Default:
 # none
 
@@ -3182,7 +3853,6 @@ cache_effective_group nobody
 #	be limited to 128Kb no matter how many workstations they are logged into.:
 #
 #delay_parameters 4 32000/32000 8000/8000 600/64000 16000/16000
-#
 #Default:
 # none
 
@@ -3195,16 +3865,13 @@ cache_effective_group nobody
 #	a host accessing it (in class 2 and class 3, individual hosts and
 #	networks only have buckets associated with them once they have been
 #	"seen" by squid).
-#
 #Default:
 # delay_initial_bucket_level 50
 
-
 # WCCPv1 AND WCCPv2 CONFIGURATION OPTIONS
 # -----------------------------------------------------------------------------
 
 #  TAG: wccp_router
-#  TAG: wccp2_router
 #	Use this option to define your WCCP ``home'' router for
 #	Squid.
 #
@@ -3214,9 +3881,21 @@ cache_effective_group nobody
 #
 #	only one of the two may be used at the same time and defines
 #	which version of WCCP to use.
+#Default:
+# wccp_router any_addr
+
+#  TAG: wccp2_router
+#	Use this option to define your WCCP ``home'' router for
+#	Squid.
+#
+#	wccp_router supports a single WCCP(v1) router
+#
+#	wccp2_router supports multiple WCCPv2 routers
 #
+#	only one of the two may be used at the same time and defines
+#	which version of WCCP to use.
 #Default:
-# wccp_router 0.0.0.0
+# none
 
 #  TAG: wccp_version
 #	This directive is only relevant if you need to set up WCCP(v1)
@@ -3229,14 +3908,12 @@ cache_effective_group nobody
 #	support WCCP version 3.  If you're using that or an earlier
 #	version of IOS, you may need to change this value to 3, otherwise
 #	do not specify this parameter.
-#
 #Default:
 # wccp_version 4
 
 #  TAG: wccp2_rebuild_wait
 #	If this is enabled Squid will wait for the cache dir rebuild to finish
 #	before sending the first wccp2 HereIAm packet
-#
 #Default:
 # wccp2_rebuild_wait on
 
@@ -3244,22 +3921,21 @@ cache_effective_group nobody
 #	WCCP2 allows the setting of forwarding methods between the
 #	router/switch and the cache.  Valid values are as follows:
 #
-#	1 - GRE encapsulation (forward the packet in a GRE/WCCP tunnel)
-#	2 - L2 redirect (forward the packet using Layer 2/MAC rewriting)
+#	gre - GRE encapsulation (forward the packet in a GRE/WCCP tunnel)
+#	l2  - L2 redirect (forward the packet using Layer 2/MAC rewriting)
 #
 #	Currently (as of IOS 12.4) cisco routers only support GRE.
 #	Cisco switches only support the L2 redirect assignment method.
-#
 #Default:
-# wccp2_forwarding_method 1
+# wccp2_forwarding_method gre
 
 #  TAG: wccp2_return_method
 #	WCCP2 allows the setting of return methods between the
 #	router/switch and the cache for packets that the cache
 #	decides not to handle.  Valid values are as follows:
 #
-#	1 - GRE encapsulation (forward the packet in a GRE/WCCP tunnel)
-#	2 - L2 redirect (forward the packet using Layer 2/MAC rewriting)
+#	gre - GRE encapsulation (forward the packet in a GRE/WCCP tunnel)
+#	l2  - L2 redirect (forward the packet using Layer 2/MAC rewriting)
 #
 #	Currently (as of IOS 12.4) cisco routers only support GRE.
 #	Cisco switches only support the L2 redirect assignment.
@@ -3268,22 +3944,20 @@ cache_effective_group nobody
 #	enabled on the cache interface, then it is still safe for
 #	the proxy server to use a l2 redirect method even if this
 #	option is set to GRE.
-#
 #Default:
-# wccp2_return_method 1
+# wccp2_return_method gre
 
 #  TAG: wccp2_assignment_method
 #	WCCP2 allows the setting of methods to assign the WCCP hash
 #	Valid values are as follows:
 #
-#	1 - Hash assignment
-#	2 - Mask assignment
+#	hash - Hash assignment
+#	mask  - Mask assignment
 #
 #	As a general rule, cisco routers support the hash assignment method
 #	and cisco switches support the mask assignment method.
-#
 #Default:
-# wccp2_assignment_method 1
+# wccp2_assignment_method hash
 
 #  TAG: wccp2_service
 #	WCCP2 allows for multiple traffic services. There are two
@@ -3305,8 +3979,6 @@ cache_effective_group nobody
 #	wccp2_service dynamic 80	# a dynamic service type which will be
 #					# fleshed out with subsequent options.
 #	wccp2_service standard 0 password=foo
-#
-#
 #Default:
 # wccp2_service standard 0
 
@@ -3321,7 +3993,7 @@ cache_effective_group nobody
 #
 #	The relevant WCCPv2 flags:
 #	+ src_ip_hash, dst_ip_hash
-#	+ source_port_hash, dest_port_hash
+#	+ source_port_hash, dst_port_hash
 #	+ src_ip_alt_hash, dst_ip_alt_hash
 #	+ src_port_alt_hash, dst_port_alt_hash
 #	+ ports_source
@@ -3335,14 +4007,12 @@ cache_effective_group nobody
 #
 #	Note: the service id must have been defined by a previous
 #	'wccp2_service dynamic <id>' entry.
-#
 #Default:
 # none
 
 #  TAG: wccp2_weight
 #	Each cache server gets assigned a set of the destination
 #	hash proportional to their weight.
-#
 #Default:
 # wccp2_weight 10000
 
@@ -3352,12 +4022,10 @@ cache_effective_group nobody
 #	interface address.
 #
 #	The default behavior is to not bind to any specific address.
-#
 #Default:
 # wccp_address 0.0.0.0
 # wccp2_address 0.0.0.0
 
-
 # PERSISTENT CONNECTION HANDLING
 # -----------------------------------------------------------------------------
 #
@@ -3369,7 +4037,6 @@ cache_effective_group nobody
 #	default, Squid uses persistent connections (when allowed)
 #	with its clients and servers.  You can use these options to
 #	disable persistent connections with clients and/or servers.
-#
 #Default:
 # client_persistent_connections on
 # server_persistent_connections on
@@ -3378,9 +4045,8 @@ cache_effective_group nobody
 #	With this directive the use of persistent connections after
 #	HTTP errors can be disabled. Useful if you have clients
 #	who fail to handle errors on persistent connections proper.
-#
 #Default:
-# persistent_connection_after_error off
+# persistent_connection_after_error on
 
 #  TAG: detect_broken_pconn
 #	Some servers have been found to incorrectly signal the use
@@ -3391,11 +4057,9 @@ cache_effective_group nobody
 #	By enabling this directive Squid attempts to detect such
 #	broken replies and automatically assume the reply is finished
 #	after 10 seconds timeout.
-#
 #Default:
 # detect_broken_pconn off
 
-
 # CACHE DIGEST OPTIONS
 # -----------------------------------------------------------------------------
 
@@ -3406,7 +4070,6 @@ cache_effective_group nobody
 #	This controls whether the server will generate a Cache Digest
 #	of its contents.  By default, Cache Digest generation is
 #	enabled if Squid is compiled with --enable-cache-digests defined.
-#
 #Default:
 # digest_generation on
 
@@ -3417,7 +4080,6 @@ cache_effective_group nobody
 #	This is the number of bits of the server's Cache Digest which
 #	will be associated with the Digest entry for a given HTTP
 #	Method and URL (public key) combination.  The default is 5.
-#
 #Default:
 # digest_bits_per_entry 5
 
@@ -3426,7 +4088,6 @@ cache_effective_group nobody
 #       --enable-cache-digests option
 #
 #	This is the wait time between Cache Digest rebuilds.
-#
 #Default:
 # digest_rebuild_period 1 hour
 
@@ -3436,7 +4097,6 @@ cache_effective_group nobody
 #
 #	This is the wait time between Cache Digest writes to
 #	disk.
-#
 #Default:
 # digest_rewrite_period 1 hour
 
@@ -3447,7 +4107,6 @@ cache_effective_group nobody
 #	This is the number of bytes of the Cache Digest to write to
 #	disk at a time.  It defaults to 4096 bytes (4KB), the Squid
 #	default swap page.
-#
 #Default:
 # digest_swapout_chunk_size 4096 bytes
 
@@ -3457,11 +4116,9 @@ cache_effective_group nobody
 #
 #	This is the percentage of the Cache Digest to be scanned at a
 #	time.  By default it is set to 10% of the Cache Digest.
-#
 #Default:
 # digest_rebuild_chunk_percentage 10
 
-
 # SNMP OPTIONS
 # -----------------------------------------------------------------------------
 
@@ -3470,10 +4127,11 @@ cache_effective_group nobody
 #	SNMP support set this to a suitable port number. Port number
 #	3401 is often used for the Squid SNMP agent. By default it's
 #	set to "0" (disabled)
+#
+#	Example:
+#		snmp_port 3401
 #Default:
 # snmp_port 0
-#
-#snmp_port 3401
 
 #  TAG: snmp_access
 #	Allowing or denying access to the SNMP port.
@@ -3483,37 +4141,36 @@ cache_effective_group nobody
 #
 #	snmp_access allow|deny [!]aclname ...
 #
+#	This clause only supports fast acl types.
+#	See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details.
 #Example:
 # snmp_access allow snmppublic localhost
 # snmp_access deny all
-#
 #Default:
 # snmp_access deny all
 
 #  TAG: snmp_incoming_address
 #  TAG: snmp_outgoing_address
-#	Just like 'udp_incoming_address' above, but for the SNMP port.
+#	Just like 'udp_incoming_address', but for the SNMP port.
 #
 #	snmp_incoming_address	is used for the SNMP socket receiving
 #				messages from SNMP agents.
 #	snmp_outgoing_address	is used for SNMP packets returned to SNMP
 #				agents.
 #
-#	The default snmp_incoming_address (0.0.0.0) is to listen on all
+#	The default snmp_incoming_address is to listen on all
 #	available network interfaces.
 #
-#	If snmp_outgoing_address is set to 255.255.255.255 (the default)
-#	it will use the same socket as snmp_incoming_address. Only
-#	change this if you want to have SNMP replies sent using another
-#	address than where this Squid listens for SNMP queries.
+#	If snmp_outgoing_address is not set it will use the same socket
+#	as snmp_incoming_address. Only change this if you want to have
+#	SNMP replies sent using another address than where this Squid
+#	listens for SNMP queries.
 #
 #	NOTE, snmp_incoming_address and snmp_outgoing_address can not have
 #	the same value since they both use port 3401.
-#
 #Default:
-# snmp_incoming_address 0.0.0.0
-# snmp_outgoing_address 255.255.255.255
-
+# snmp_incoming_address any_addr
+# snmp_outgoing_address no_addr
 
 # ICP OPTIONS
 # -----------------------------------------------------------------------------
@@ -3522,25 +4179,26 @@ cache_effective_group nobody
 #	The port number where Squid sends and receives ICP queries to
 #	and from neighbor caches.  The standard UDP port for ICP is 3130.
 #	Default is disabled (0).
+#
+#	Example:
+#		icp_port 3130
 #Default:
 # icp_port 0
-#
-icp_port 3130
 
 #  TAG: htcp_port
 #	The port number where Squid sends and receives HTCP queries to
 #	and from neighbor caches.  To turn it on you want to set it to
 #	4827. By default it is set to "0" (disabled).
+#
+#	Example:
+#		htcp_port 4827
 #Default:
 # htcp_port 0
-#
-#htcp_port 4827
 
 #  TAG: log_icp_queries	on|off
 #	If set, ICP queries are logged to access.log. You may wish
 #	do disable this if your ICP load is VERY high to speed things
 #	up or to simplify log analysis.
-#
 #Default:
 # log_icp_queries on
 
@@ -3560,9 +4218,8 @@ icp_port 3130
 #
 #	NOTE, udp_incoming_address and udp_outgoing_address can not
 #	have the same value since they both use the same port.
-#
 #Default:
-# udp_incoming_address 0.0.0.0
+# udp_incoming_address any_addr
 
 #  TAG: udp_outgoing_address
 #	udp_outgoing_address	is used for UDP packets sent out to other
@@ -3582,9 +4239,8 @@ icp_port 3130
 #
 #	NOTE, udp_incoming_address and udp_outgoing_address can not
 #	have the same value since they both use the same port.
-#
 #Default:
-# udp_outgoing_address 255.255.255.255
+# udp_outgoing_address no_addr
 
 #  TAG: icp_hit_stale	on|off
 #	If you want to return ICP_HIT for stale cache objects, set this
@@ -3594,21 +4250,18 @@ icp_port 3130
 #	it is probably okay to set this to 'on'.
 #	If set to 'on', your siblings should use the option "allow-miss"
 #	on their cache_peer lines for connecting to you.
-#
 #Default:
 # icp_hit_stale off
 
 #  TAG: minimum_direct_hops
 #	If using the ICMP pinging stuff, do direct fetches for sites
 #	which are no more than this many hops away.
-#
 #Default:
 # minimum_direct_hops 4
 
 #  TAG: minimum_direct_rtt
 #	If using the ICMP pinging stuff, do direct fetches for sites
 #	which are no more than this many rtt milliseconds away.
-#
 #Default:
 # minimum_direct_rtt 400
 
@@ -3618,7 +4271,6 @@ icp_port 3130
 #	database.  These are counts, not percents.  The defaults are
 #	900 and 1000.  When the high water mark is reached, database
 #	entries will be deleted until the low mark is reached.
-#
 #Default:
 # netdb_low 900
 # netdb_high 1000
@@ -3627,7 +4279,6 @@ icp_port 3130
 #	The minimum period for measuring a site.  There will be at
 #	least this much delay between successive pings to the same
 #	network.  The default is five minutes.
-#
 #Default:
 # netdb_ping_period 5 minutes
 
@@ -3643,7 +4294,6 @@ icp_port 3130
 #	the minimal RTT to the origin server.  When this happens, the
 #	hierarchy field of the access.log will be
 #	"CLOSEST_PARENT_MISS".  This option is off by default.
-#
 #Default:
 # query_icmp off
 
@@ -3651,7 +4301,6 @@ icp_port 3130
 #	When this is 'on', ICP MISS replies will be ICP_MISS_NOFETCH
 #	instead of ICP_MISS if the target host is NOT in the ICMP
 #	database, or has a zero RTT.
-#
 #Default:
 # test_reachability off
 
@@ -3664,7 +4313,6 @@ icp_port 3130
 #	timeout (the old default), you would write:
 #
 #		icp_query_timeout 2000
-#
 #Default:
 # icp_query_timeout 0
 
@@ -3675,7 +4323,6 @@ icp_port 3130
 #	value.  Do NOT use this option to always use a fixed (instead
 #	of a dynamic) timeout value. To set a fixed timeout see the
 #	'icp_query_timeout' directive.
-#
 #Default:
 # maximum_icp_query_timeout 2000
 
@@ -3687,18 +4334,15 @@ icp_port 3130
 #	value.  Do NOT use this option to always use a fixed (instead
 #	of a dynamic) timeout value. To set a fixed timeout see the
 #	'icp_query_timeout' directive.
-#
 #Default:
 # minimum_icp_query_timeout 5
 
 #  TAG: background_ping_rate	time-units
 #	Controls how often the ICP pings are sent to siblings that
 #	have background-ping set.
-#
 #Default:
 # background_ping_rate 10 seconds
 
-
 # MULTICAST ICP OPTIONS
 # -----------------------------------------------------------------------------
 
@@ -3723,7 +4367,6 @@ icp_port 3130
 #	Usage: mcast_groups 239.128.16.128 224.0.1.20
 #
 #	By default, Squid doesn't listen on any multicast groups.
-#
 #Default:
 # none
 
@@ -3736,9 +4379,8 @@ icp_port 3130
 #
 #	Do not enable this option unless you are are absolutely
 #	certain you understand what you are doing.
-#
 #Default:
-# mcast_miss_addr 255.255.255.255
+# mcast_miss_addr no_addr
 
 #  TAG: mcast_miss_ttl
 # Note: This option is only available if Squid is rebuilt with the
@@ -3747,7 +4389,6 @@ icp_port 3130
 #	This is the time-to-live value for packets multicasted
 #	when multicasting off cache miss URLs is enabled.  By
 #	default this is set to 'site scope', i.e. 16.
-#
 #Default:
 # mcast_miss_ttl 16
 
@@ -3757,7 +4398,6 @@ icp_port 3130
 #
 #	This is the port number to be used in conjunction with
 #	'mcast_miss_addr'.
-#
 #Default:
 # mcast_miss_port 3135
 
@@ -3767,7 +4407,6 @@ icp_port 3130
 #
 #	The URLs that are sent in the multicast miss stream are
 #	encrypted.  This is the encryption key.
-#
 #Default:
 # mcast_miss_encode_key XXXXXXXXXXXXXXXX
 
@@ -3777,18 +4416,15 @@ icp_port 3130
 #	address.  This value specifies how long Squid should wait to
 #	count all the replies.  The default is 2000 msec, or 2
 #	seconds.
-#
 #Default:
 # mcast_icp_query_timeout 2000
 
-
 # INTERNAL ICON OPTIONS
 # -----------------------------------------------------------------------------
 
 #  TAG: icon_directory
 #	Where the icons are stored. These are normally kept in
 #	/usr/share/squid/icons
-#
 #Default:
 # icon_directory /usr/share/squid/icons
 
@@ -3800,7 +4436,6 @@ icp_port 3130
 #	icons etc work better in complex cache hierarchies where it may
 #	not always be possible for all corners in the cache mesh to reach
 #	the server generating a directory listing.
-#
 #Default:
 # global_internal_static on
 
@@ -3811,27 +4446,62 @@ icp_port 3130
 #
 #	If you run a complex cache hierarchy with a mix of Squid and
 #	other proxies you may need to disable this directive.
-#
 #Default:
 # short_icon_urls on
 
-
 # ERROR PAGE OPTIONS
 # -----------------------------------------------------------------------------
 
 #  TAG: error_directory
 #	If you wish to create your own versions of the default
-#	(English) error files, either to customize them to suit your
-#	language or company copy the template English files to another
-#	directory and point this tag at them.
+#	error files to customize them to suit your company copy
+#	the error/template files to another directory and point
+#	this tag at them.
+#
+#	WARNING: This option will disable multi-language support
+#	         on error pages if used.
 #
 #	The squid developers are interested in making squid available in
 #	a wide variety of languages. If you are making translations for a
-#	langauge that Squid does not currently provide please consider
+#	language that Squid does not currently provide please consider
 #	contributing your translation back to the project.
+#	http://wiki.squid-cache.org/Translations
+#
+#	The squid developers working on translations are happy to supply drop-in
+#	translated error files in exchange for any new language contributions.
+#Default:
+# none
+
+#  TAG: error_default_language
+#	Set the default language which squid will send error pages in
+#	if no existing translation matches the clients language
+#	preferences.
+#
+#	If unset (default) generic English will be used.
+#
+#	The squid developers are interested in making squid available in
+#	a wide variety of languages. If you are interested in making
+#	translations for any language see the squid wiki for details.
+#	http://wiki.squid-cache.org/Translations
+#Default:
+# none
+
+#  TAG: error_log_languages
+#	Log to cache.log what languages users are attempting to
+#	auto-negotiate for translations.
+#
+#	Successful negotiations are not logged. Only failures
+#	have meaning to indicate that Squid may need an upgrade
+#	of its error page translations.
+#Default:
+# error_log_languages on
+
+#  TAG: err_page_stylesheet
+#	CSS Stylesheet to pattern the display of Squid default error pages.
 #
+#	For information on CSS see http://www.w3.org/Style/CSS/
 #Default:
-# error_directory /usr/share/squid/errors/English
+# err_page_stylesheet /etc/squid/errorpage.css
 
 #  TAG: err_html_text
 #	HTML text to include in error messages.  Make this a "mailto"
@@ -3842,7 +4512,6 @@ icp_port 3130
 #	the error template files (found in the "errors" directory).
 #	Wherever you want the 'err_html_text' line to appear,
 #	insert a %L tag in the error template file.
-#
 #Default:
 # none
 
@@ -3851,14 +4520,13 @@ icp_port 3130
 #	included in the mailto links of the ERR pages (if %W is set)
 #	so that the email body contains the data.
 #	Syntax is <A HREF="mailto:%w%W">%w</A>
-#
 #Default:
 # email_err_data on
 
 #  TAG: deny_info
 #	Usage:   deny_info err_page_name acl
 #	or       deny_info http://... acl
-#	Example: deny_info ERR_CUSTOM_ACCESS_DENIED bad_guys
+#	or       deny_info TCP_RESET acl
 #
 #	This can be used to return a ERR_ page for requests which
 #	do not pass the 'http_access' rules.  Squid remembers the last
@@ -3872,8 +4540,9 @@ icp_port 3130
 #	- When none of the http_access lines matches. It's then the last
 #	  acl processed on the last http_access line.
 #
-#	You may use ERR_ pages that come with Squid or create your own pages
-#	and put them into the configured errors/ directory.
+#	NP: If providing your own custom error pages with error_directory
+#	    you may also specify them by your custom file name:
+#	    Example: deny_info ERR_CUSTOM_ACCESS_DENIED bad_guys
 #
 #	Alternatively you can specify an error URL. The browsers will
 #	get redirected (302) to the specified URL. %s in the redirection
@@ -3881,11 +4550,9 @@ icp_port 3130
 #
 #	Alternatively you can tell Squid to reset the TCP connection
 #	by specifying TCP_RESET.
-#
 #Default:
 # none
 
-
 # OPTIONS INFLUENCING REQUEST FORWARDING 
 # -----------------------------------------------------------------------------
 
@@ -3903,7 +4570,6 @@ icp_port 3130
 #
 #	If you are inside an firewall see never_direct instead of
 #	this directive.
-#
 #Default:
 # nonhierarchical_direct on
 
@@ -3919,7 +4585,6 @@ icp_port 3130
 #	Note: If you want Squid to use parents for all requests see
 #	the never_direct directive. prefer_direct only modifies how Squid
 #	acts on cacheable requests.
-#
 #Default:
 # prefer_direct off
 
@@ -3958,11 +4623,10 @@ icp_port 3130
 #
 #	NOTE: This directive is not related to caching. The replies
 #	is cached as usual even if you use always_direct. To not cache
-#	the replies see no_cache.
-#
-#	This option replaces some v1.1 options such as local_domain
-#	and local_ip.
+#	the replies see the 'cache' directive.
 #
+#	This clause supports both fast and slow acl types.
+#	See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details.
 #Default:
 # none
 
@@ -3978,7 +4642,6 @@ icp_port 3130
 #	requests, except those in your local domain use something like:
 #
 #		acl local-servers dstdomain .foo.net
-#		acl all src 0.0.0.0/0.0.0.0
 #		never_direct deny local-servers
 #		never_direct allow all
 #
@@ -3991,13 +4654,11 @@ icp_port 3130
 #		always_direct allow local-intranet
 #		never_direct allow all
 #
-#	This option replaces some v1.1 options such as inside_firewall
-#	and firewall_ip.
-#
+#	This clause supports both fast and slow acl types.
+#	See http://wiki.squid-cache.org/SquidFaq/SquidAcl for details.
 #Default:
 # none
 
-
 # ADVANCED NETWORKING OPTIONS
 # -----------------------------------------------------------------------------
 
@@ -4010,7 +4671,6 @@ icp_port 3130
 #	Heavy voodoo here.  I can't even believe you are reading this.
 #	Are you crazy?  Don't even think about adjusting these unless
 #	you understand the algorithms in comm_select.c first!
-#
 #Default:
 # incoming_icp_average 6
 # incoming_http_average 4
@@ -4046,34 +4706,45 @@ icp_port 3130
 #accept_filter httpready
 ## Linux
 #accept_filter data
-#
 #Default:
 # none
 
+#  TAG: client_ip_max_connections
+#	Set an absolute limit on the number of connections a single
+#	client IP can use. Any more than this and Squid will begin to drop
+#	new connections from the client until it closes some links.
+#
+#	Note that this is a global limit. It affects all HTTP, HTCP, Gopher and FTP
+#	connections from the client. For finer control use the ACL access controls.
+#
+#	Requires client_db to be enabled (the default).
+#
+#	WARNING: This may noticably slow down traffic received via external proxies
+#	or NAT devices and cause them to rebound error messages back to their clients.
+#Default:
+# client_ip_max_connections -1
+
 #  TAG: tcp_recv_bufsize	(bytes)
 #	Size of receive buffer to set for TCP sockets.  Probably just
 #	as easy to change your kernel's default.  Set to zero to use
 #	the default buffer size.
-#
 #Default:
 # tcp_recv_bufsize 0 bytes
 
-
 # ICAP OPTIONS
 # -----------------------------------------------------------------------------
 
 #  TAG: icap_enable	on|off
 # Note: This option is only available if Squid is rebuilt with the
-#       -DICAP_CLIENT define
+#       --enable-icap-client option
 #
 #	If you want to enable the ICAP module support, set this to on.
-#
 #Default:
 # icap_enable off
 
 #  TAG: icap_connect_timeout
 # Note: This option is only available if Squid is rebuilt with the
-#       -DICAP_CLIENT define
+#       --enable-icap-client option
 #
 #	This parameter specifies how long to wait for the TCP connect to
 #	the requested ICAP server to complete before giving up and either
@@ -4082,13 +4753,12 @@ icp_port 3130
 #	The default for optional services is peer_connect_timeout.
 #	The default for essential services is connect_timeout.
 #	If this option is explicitly set, its value applies to all services.
-#
 #Default:
 # none
 
 #  TAG: icap_io_timeout	time-units
 # Note: This option is only available if Squid is rebuilt with the
-#       -DICAP_CLIENT define
+#       --enable-icap-client option
 #
 #	This parameter specifies how long to wait for an I/O activity on
 #	an established, active ICAP connection before giving up and
@@ -4096,13 +4766,12 @@ icp_port 3130
 #	failure.
 #
 #	The default is read_timeout.
-#
 #Default:
 # none
 
 #  TAG: icap_service_failure_limit
 # Note: This option is only available if Squid is rebuilt with the
-#       -DICAP_CLIENT define
+#       --enable-icap-client option
 #
 #	The limit specifies the number of failures that Squid tolerates
 #	when establishing a new TCP connection with an ICAP service. If
@@ -4114,13 +4783,12 @@ icp_port 3130
 #	A negative value disables the limit. Without the limit, an ICAP
 #	service will not be considered down due to connectivity failures
 #	between ICAP OPTIONS requests.
-#
 #Default:
 # icap_service_failure_limit 10
 
 #  TAG: icap_service_revival_delay
 # Note: This option is only available if Squid is rebuilt with the
-#       -DICAP_CLIENT define
+#       --enable-icap-client option
 #
 #	The delay specifies the number of seconds to wait after an ICAP
 #	OPTIONS request failure before requesting the options again. The
@@ -4129,13 +4797,12 @@ icp_port 3130
 #
 #	The actual delay cannot be smaller than the hardcoded minimum
 #	delay of 30 seconds.
-#
 #Default:
 # icap_service_revival_delay 180
 
 #  TAG: icap_preview_enable	on|off
 # Note: This option is only available if Squid is rebuilt with the
-#       -DICAP_CLIENT define
+#       --enable-icap-client option
 #
 #	The ICAP Preview feature allows the ICAP server to handle the
 #	HTTP message by looking only at the beginning of the message body
@@ -4150,150 +4817,404 @@ icp_port 3130
 #	individual ICAP server OPTIONS responses, set this option to "off".
 #Example:
 #icap_preview_enable off
-#
 #Default:
 # icap_preview_enable on
 
 #  TAG: icap_preview_size
 # Note: This option is only available if Squid is rebuilt with the
-#       -DICAP_CLIENT define
+#       --enable-icap-client option
 #
 #	The default size of preview data to be sent to the ICAP server.
 #	-1 means no preview. This value might be overwritten on a per server
 #	basis by OPTIONS requests.
-#
 #Default:
 # icap_preview_size -1
 
 #  TAG: icap_default_options_ttl
 # Note: This option is only available if Squid is rebuilt with the
-#       -DICAP_CLIENT define
+#       --enable-icap-client option
 #
 #	The default TTL value for ICAP OPTIONS responses that don't have
 #	an Options-TTL header.
-#
 #Default:
 # icap_default_options_ttl 60
 
 #  TAG: icap_persistent_connections	on|off
 # Note: This option is only available if Squid is rebuilt with the
-#       -DICAP_CLIENT define
+#       --enable-icap-client option
 #
 #	Whether or not Squid should use persistent connections to
 #	an ICAP server.
-#
 #Default:
 # icap_persistent_connections on
 
 #  TAG: icap_send_client_ip	on|off
 # Note: This option is only available if Squid is rebuilt with the
-#       -DICAP_CLIENT define
+#       --enable-icap-client option
 #
 #	This adds the header "X-Client-IP" to ICAP requests.
-#
 #Default:
 # icap_send_client_ip off
 
 #  TAG: icap_send_client_username	on|off
 # Note: This option is only available if Squid is rebuilt with the
-#       -DICAP_CLIENT define
+#       --enable-icap-client option
 #
 #	This sends authenticated HTTP client username (if available) to
 #	the ICAP service. The username value is encoded based on the
 #	icap_client_username_encode option and is sent using the header
 #	specified by the icap_client_username_header option.
-#
 #Default:
 # icap_send_client_username off
 
 #  TAG: icap_client_username_header
 # Note: This option is only available if Squid is rebuilt with the
-#       -DICAP_CLIENT define
+#       --enable-icap-client option
 #
 #	ICAP request header name to use for send_client_username.
-#
 #Default:
 # icap_client_username_header X-Client-Username
 
 #  TAG: icap_client_username_encode	on|off
 # Note: This option is only available if Squid is rebuilt with the
-#       -DICAP_CLIENT define
+#       --enable-icap-client option
 #
 #	Whether to base64 encode the authenticated client username.
-#
 #Default:
 # icap_client_username_encode off
 
 #  TAG: icap_service
 # Note: This option is only available if Squid is rebuilt with the
-#       -DICAP_CLIENT define
+#       --enable-icap-client option
 #
-#	Defines a single ICAP service
+#	Defines a single ICAP service using the following format:
 #
-#	icap_service servicename vectoring_point bypass service_url
+#	icap_service service_name vectoring_point [options] service_url
 #
-#	vectoring_point = reqmod_precache|reqmod_postcache|respmod_precache|respmod_postcache
+#	service_name: ID
+#		an opaque identifier which must be unique in squid.conf
+#
+#	vectoring_point: reqmod_precache|reqmod_postcache|respmod_precache|respmod_postcache
 #		This specifies at which point of transaction processing the
 #		ICAP service should be activated. *_postcache vectoring points
 #		are not yet supported.
+#
+#	service_url: icap://servername:port/servicepath
+#		ICAP server and service location.
+#
+#	ICAP does not allow a single service to handle both REQMOD and RESPMOD
+#	transactions. Squid does not enforce that requirement. You can specify
+#	services with the same service_url and different vectoring_points. You
+#	can even specify multiple identical services as long as their
+#	service_names differ.
+#
+#
+#	Service options are separated by white space. ICAP services support
+#	the following name=value options:
+#
+#	bypass=on|off|1|0
+#		If set to 'on' or '1', the ICAP service is treated as
+#		optional. If the service cannot be reached or malfunctions,
+#		Squid will try to ignore any errors and process the message as
+#		if the service was not enabled. No all ICAP errors can be
+#		bypassed.  If set to 0, the ICAP service is treated as
+#		essential and all ICAP errors will result in an error page
+#		returned to the HTTP client.
+#
+#		Bypass is off by default: services are treated as essential.
+#
+#	routing=on|off|1|0
+#		If set to 'on' or '1', the ICAP service is allowed to
+#		dynamically change the current message adaptation plan by
+#		returning a chain of services to be used next. The services
+#		are specified using the X-Next-Services ICAP response header
+#		value, formatted as a comma-separated list of service names.
+#		Each named service should be configured in squid.conf and
+#		should have the same method and vectoring point as the current
+#		ICAP transaction.  Services violating these rules are ignored.
+#		An empty X-Next-Services value results in an empty plan which
+#		ends the current adaptation. 
+#
+#		Routing is not allowed by default: the ICAP X-Next-Services
+#		response header is ignored.
+#
+#	Older icap_service format without optional named parameters is
+#	deprecated but supported for backward compatibility.
+#
+#Example:
+#icap_service svcBlocker reqmod_precache bypass=0 icap://icap1.mydomain.net:1344/reqmod
+#icap_service svcLogger reqmod_precache routing=on icap://icap2.mydomain.net:1344/respmod
+#Default:
+# none
+
+#  TAG: icap_class
+# Note: This option is only available if Squid is rebuilt with the
+#       --enable-icap-client option
+#
+#	This deprecated option was documented to define an ICAP service
+#	chain, even though it actually defined a set of similar, redundant
+#	services, and the chains were not supported. 
+#
+#	To define a set of redundant services, please use the
+#	adaptation_service_set directive. For service chains, use
+#	adaptation_service_chain.
+#Default:
+# none
+
+#  TAG: icap_access
+# Note: This option is only available if Squid is rebuilt with the
+#       --enable-icap-client option
+#
+#	This option is deprecated. Please use adaptation_access, which
+#	has the same ICAP functionality, but comes with better
+#	documentation, and eCAP support.
+#Default:
+# none
+
+# eCAP OPTIONS
+# -----------------------------------------------------------------------------
+
+#  TAG: ecap_enable	on|off
+# Note: This option is only available if Squid is rebuilt with the
+#       --enable-ecap option
+#
+#	Controls whether eCAP support is enabled.
+#Default:
+# ecap_enable off
+
+#  TAG: ecap_service
+# Note: This option is only available if Squid is rebuilt with the
+#       --enable-ecap option
+#
+#	Defines a single eCAP service
+#
+#	ecap_service servicename vectoring_point bypass service_url
+#
+#	vectoring_point = reqmod_precache|reqmod_postcache|respmod_precache|respmod_postcache
+#		This specifies at which point of transaction processing the
+#		eCAP service should be activated. *_postcache vectoring points
+#		are not yet supported.
 #	bypass = 1|0
-#		If set to 1, the ICAP service is treated as optional. If the
+#		If set to 1, the eCAP service is treated as optional. If the
 #		service cannot be reached or malfunctions, Squid will try to
 #		ignore any errors and process the message as if the service
-#		was not enabled. No all ICAP errors can be bypassed.
-#		If set to 0, the ICAP service is treated as essential and all
-#		ICAP errors will result in an error page returned to the
+#		was not enabled. No all eCAP errors can be bypassed.
+#		If set to 0, the eCAP service is treated as essential and all
+#		eCAP errors will result in an error page returned to the
 #		HTTP client.
-#	service_url = icap://servername:port/service
+#	service_url = ecap://vendor/service_name?custom&cgi=style&parameters=optional
 #
 #Example:
-#icap_service service_1 reqmod_precache 0 icap://icap1.mydomain.net:1344/reqmod
-#icap_service service_2 respmod_precache 0 icap://icap2.mydomain.net:1344/respmod
-#
+#ecap_service service_1 reqmod_precache 0 ecap://filters-R-us/leakDetector?on_error=block
+#ecap_service service_2 respmod_precache 1 icap://filters-R-us/virusFilter?config=/etc/vf.cfg
 #Default:
 # none
 
-#  TAG: icap_class
+#  TAG: loadable_modules
+#	Instructs Squid to load the specified dynamic module(s) or activate
+#	preloaded module(s).
+#Example:
+#loadable_modules /usr/lib/MinimalAdapter.so
+#Default:
+# none
+
+# MESSAGE ADAPTATION OPTIONS
+# -----------------------------------------------------------------------------
+
+#  TAG: adaptation_service_set
 # Note: This option is only available if Squid is rebuilt with the
-#       -DICAP_CLIENT define
+#       --enable-ecap or --enable-icap-client option
 #
-#	Defines an ICAP service chain. Eventually, multiple services per
-#	vectoring point will be supported. For now, please specify a single
-#	service per class:
 #
-#	icap_class classname servicename
+#	Configures an ordered set of similar, redundant services. This is
+#	useful when hot standby or backup adaptation servers are available.
+#
+#	    adaptation_service_set set_name service_name1 service_name2 ...
+#
+# 	The named services are used in the set declaration order. The first
+#	applicable adaptation service from the set is used first. The next
+#	applicable service is tried if and only if the transaction with the
+#	previous service fails and the message waiting to be adapted is still
+#	intact.
+#
+#	When adaptation starts, broken services are ignored as if they were
+#	not a part of the set. A broken service is a down optional service.
+#
+#	The services in a set must be attached to the same vectoring point
+#	(e.g., pre-cache) and use the same adaptation method (e.g., REQMOD).
+#
+#	If all services in a set are optional then adaptation failures are
+#	bypassable. If all services in the set are essential, then a
+#	transaction failure with one service may still be retried using
+#	another service from the set, but when all services fail, the master
+#	transaction fails as well.
+#
+#	A set may contain a mix of optional and essential services, but that
+#	is likely to lead to surprising results because broken services become
+#	ignored (see above), making previously bypassable failures fatal.
+#	Technically, it is the bypassability of the last failed service that
+#	matters.
+#
+#	See also: adaptation_access adaptation_service_chain
 #
 #Example:
-#icap_class class_1 service_1
-#icap class class_2 service_1
-#icap class class_3 service_3
+#adaptation_service_set svcBlocker urlFilterPrimary urlFilterBackup
+#adaptation service_set svcLogger loggerLocal loggerRemote
+#Default:
+# none
+
+#  TAG: adaptation_service_chain
+# Note: This option is only available if Squid is rebuilt with the
+#       --enable-ecap or --enable-icap-client option
+#
 #
+#	Configures a list of complementary services that will be applied
+#	one-by-one, forming an adaptation chain or pipeline. This is useful
+#	when Squid must perform different adaptations on the same message.
+#
+#	    adaptation_service_chain chain_name service_name1 svc_name2 ...
+#
+# 	The named services are used in the chain declaration order. The first
+#	applicable adaptation service from the chain is used first. The next
+#	applicable service is applied to the successful adaptation results of
+#	the previous service in the chain.
+#
+#	When adaptation starts, broken services are ignored as if they were
+#	not a part of the chain. A broken service is a down optional service.
+#
+#	Request satisfaction terminates the adaptation chain because Squid
+#	does not currently allow declaration of RESPMOD services at the
+#	"reqmod_precache" vectoring point (see icap_service or ecap_service).
+#
+#	The services in a chain must be attached to the same vectoring point
+#	(e.g., pre-cache) and use the same adaptation method (e.g., REQMOD).
+#
+#	A chain may contain a mix of optional and essential services. If an
+#	essential adaptation fails (or the failure cannot be bypassed for
+#	other reasons), the master transaction fails. Otherwise, the failure
+#	is bypassed as if the failed adaptation service was not in the chain.
+#
+#	See also: adaptation_access adaptation_service_set
+#
+#Example:
+#adaptation_service_chain svcRequest requestLogger urlFilter leakDetector
 #Default:
 # none
 
-#  TAG: icap_access
+#  TAG: adaptation_access
 # Note: This option is only available if Squid is rebuilt with the
-#       -DICAP_CLIENT define
+#       --enable-ecap or --enable-icap-client option
+#
+#	Sends an HTTP transaction to an ICAP or eCAP adaptation	service.
 #
-#	Redirects a request through an ICAP service class, depending
-#	on given acls
+#	adaptation_access service_name allow|deny [!]aclname...
+#	adaptation_access set_name     allow|deny [!]aclname...
 #
-#	icap_access classname allow|deny [!]aclname...
+#	At each supported vectoring point, the adaptation_access
+#	statements are processed in the order they appear in this
+#	configuration file. Statements pointing to the following services
+#	are ignored (i.e., skipped without checking their ACL):
 #
-#	The icap_access statements are processed in the order they appear in
-#	this configuration file. If an access list matches, the processing stops.
-#	For an "allow" rule, the specified class is used for the request. A "deny"
-#	rule simply stops processing without using the class. You can also use the
-#	special classname "None".
+#	    - services serving different vectoring points
+#	    - "broken-but-bypassable" services
+#	    - "up" services configured to ignore such transactions
+#              (e.g., based on the ICAP Transfer-Ignore header).
+#
+#        When a set_name is used, all services in the set are checked
+#	using the same rules, to find the first applicable one. See
+#	adaptation_service_set for details.
+#
+#	If an access list is checked and there is a match, the
+#	processing stops: For an "allow" rule, the corresponding
+#	adaptation service is used for the transaction. For a "deny"
+#	rule, no adaptation service is activated.
+#
+#	It is currently not possible to apply more than one adaptation
+#	service at the same vectoring point to the same HTTP transaction.
+#
+#        See also: icap_service and ecap_service
 #
-#	For backward compatibility, it is also possible to use services
-#	directly here.
 #Example:
-#icap_access class_1 allow all
+#adaptation_access service_1 allow all
+#Default:
+# none
+
+#  TAG: adaptation_service_iteration_limit
+# Note: This option is only available if Squid is rebuilt with the
+#       --enable-ecap or --enable-icap-client option
+#
+#	Limits the number of iterations allowed when applying adaptation
+#	services to a message. If your longest adaptation set or chain
+#	may have more than 16 services, increase the limit beyond its
+#	default value of 16. If detecting infinite iteration loops sooner
+#	is critical, make the iteration limit match the actual number
+#	of services in your longest adaptation set or chain.
 #
+#	Infinite adaptation loops are most likely with routing services.
+#
+#	See also: icap_service routing=1
+#Default:
+# adaptation_service_iteration_limit 16
+
+#  TAG: adaptation_masterx_shared_names
+# Note: This option is only available if Squid is rebuilt with the
+#       --enable-ecap or --enable-icap-client option
+#
+#	For each master transaction (i.e., the HTTP request and response
+#	sequence, including all related ICAP and eCAP exchanges), Squid
+#	maintains a table of metadata. The table entries are (name, value)
+#	pairs shared among eCAP and ICAP exchanges. The table is destroyed
+#	with the master transaction.
+#
+#	This option specifies the table entry names that Squid must accept
+#	from and forward to the adaptation transactions.
+#
+#	An ICAP REQMOD or RESPMOD transaction may set an entry in the 
+#	shared table by returning an ICAP header field with a name 
+#	specified in adaptation_masterx_shared_names. Squid will store 
+#	and forward that ICAP header field to subsequent ICAP 
+#	transactions within the same master transaction scope.
+#
+#	Only one shared entry name is supported at this time.
+#
+#Example:
+## share authentication information among ICAP services
+#adaptation_masterx_shared_names X-Subscriber-ID
 #Default:
 # none
 
+#  TAG: icap_retry
+# Note: This option is only available if Squid is rebuilt with the
+#       --enable-icap-client option
+#
+#	This ACL determines which retriable ICAP transactions are
+#	retried. Transactions that received a complete ICAP response
+#	and did not have to consume or produce HTTP bodies to receive
+#	that response are usually retriable.
+#
+#	icap_retry allow|deny [!]aclname ...
+#
+#	Squid automatically retries some ICAP I/O timeouts and errors
+#	due to persistent connection race conditions.
+#
+#	See also: icap_retry_limit
+#Default:
+# icap_retry deny all
+
+#  TAG: icap_retry_limit
+# Note: This option is only available if Squid is rebuilt with the
+#       --enable-icap-client option
+#
+#	Limits the number of retries allowed. When set to zero (default),
+#	no retries are allowed.
+#
+#	Communication errors due to persistent connection race
+#	conditions are unavoidable, automatically retried, and do not
+#	count against this limit.
+#
+#	See also: icap_retry
+#Default:
+# icap_retry_limit 0
 
 # DNS OPTIONS
 # -----------------------------------------------------------------------------
@@ -4302,7 +5223,6 @@ icp_port 3130
 #	For security and stability reasons Squid can check
 #	hostnames for Internet standard RFC compliance. If you want
 #	Squid to perform these checks turn this directive on.
-#
 #Default:
 # check_hostnames off
 
@@ -4311,7 +5231,6 @@ icp_port 3130
 #	but nevertheless used by many sites. Set this to off if you want
 #	Squid to be strict about the standard.
 #	This check is performed only when check_hostnames is set to on.
-#
 #Default:
 # allow_underscore on
 
@@ -4320,7 +5239,6 @@ icp_port 3130
 #       --disable-internal-dns option
 #
 #	Specify the location of the executable for dnslookup process.
-#
 #Default:
 # cache_dns_program /usr/libexec/dnsserver
 
@@ -4334,7 +5252,6 @@ icp_port 3130
 #	is 32.  The default is 5.
 #
 #	You must have at least one dnsserver process.
-#
 #Default:
 # dns_children 5
 
@@ -4342,7 +5259,6 @@ icp_port 3130
 #	Initial retransmit interval for DNS queries. The interval is
 #	doubled each time all configured DNS servers have been tried.
 #
-#
 #Default:
 # dns_retransmit_interval 5 seconds
 
@@ -4350,7 +5266,6 @@ icp_port 3130
 #	DNS Query timeout. If no response is received to a DNS query
 #	within this time all DNS servers for the queried domain
 #	are assumed to be unavailable.
-#
 #Default:
 # dns_timeout 2 minutes
 
@@ -4359,7 +5274,6 @@ icp_port 3130
 #	(see res_init(3)).  This prevents caches in a hierarchy
 #	from interpreting single-component hostnames locally.  To allow
 #	Squid to handle single-component names, enable this option.
-#
 #Default:
 # dns_defnames off
 
@@ -4373,7 +5287,6 @@ icp_port 3130
 #	configurations are supported.
 #
 #	Example: dns_nameservers 10.0.0.1 192.172.0.4
-#
 #Default:
 # none
 
@@ -4400,18 +5313,9 @@ icp_port 3130
 #	If append_domain is used, that domain will be added to
 #	domain-local (i.e. not containing any dot character) host
 #	definitions.
-#
 #Default:
 # hosts_file /etc/hosts
 
-#  TAG: dns_testnames
-#	The DNS tests exit as soon as the first site is successfully looked up
-#
-#	This test can be disabled with the -D command line option.
-#
-#Default:
-# dns_testnames netscape.com internic.net nlanr.net microsoft.com
-
 #  TAG: append_domain
 #	Appends local domain name to hostnames without any dots in
 #	them.  append_domain must begin with a period.
@@ -4422,7 +5326,6 @@ icp_port 3130
 #
 #Example:
 # append_domain .yourdomain.com
-#
 #Default:
 # none
 
@@ -4432,15 +5335,30 @@ icp_port 3130
 #	don't match, Squid ignores the response and writes a warning
 #	message to cache.log.  You can allow responses from unknown
 #	nameservers by setting this option to 'off'.
-#
 #Default:
 # ignore_unknown_nameservers on
 
+#  TAG: dns_v4_fallback
+#	Standard practice with DNS is to lookup either A or AAAA records
+#	and use the results if it succeeds. Only looking up the other if
+#	the first attempt fails or otherwise produces no results.
+#
+#	That policy however will cause squid to produce error pages for some
+#	servers that advertise AAAA but are unreachable over IPv6.
+#
+#	If this is ON  squid will always lookup both AAAA and A, using both.
+#	If this is OFF squid will lookup AAAA and only try A if none found.
+#
+#	WARNING: There are some possibly unwanted side-effects with this on:
+#		*) Doubles the load placed by squid on the DNS network.
+#		*) May negatively impact connection delay times.
+#Default:
+# dns_v4_fallback on
+
 #  TAG: ipcache_size	(number of entries)
 #  TAG: ipcache_low	(percent)
 #  TAG: ipcache_high	(percent)
 #	The size, low-, and high-water marks for the IP cache.
-#
 #Default:
 # ipcache_size 1024
 # ipcache_low 90
@@ -4448,11 +5366,9 @@ icp_port 3130
 
 #  TAG: fqdncache_size	(number of entries)
 #	Maximum number of FQDN cache entries.
-#
 #Default:
 # fqdncache_size 1024
 
-
 # MISCELLANEOUS
 # -----------------------------------------------------------------------------
 
@@ -4461,7 +5377,6 @@ icp_port 3130
 #	available for future use.  If memory is a premium on your
 #	system and you believe your malloc library outperforms Squid
 #	routines, disable this.
-#
 #Default:
 # memory_pools on
 
@@ -4477,31 +5392,37 @@ icp_port 3130
 #	memory_pools_limit to a reasonably high value even if your
 #	configuration will use less memory.
 #
-#	If set to zero, Squid will keep all memory it can. That is, there
+#	If set to none, Squid will keep all memory it can. That is, there
 #	will be no limit on the total amount of memory used for safe-keeping.
 #
 #	To disable memory allocation optimization, do not set
-#	memory_pools_limit to 0. Set memory_pools to "off" instead.
+#	memory_pools_limit to 0 or none. Set memory_pools to "off" instead.
 #
 #	An overhead for maintaining memory pools is not taken into account
 #	when the limit is checked. This overhead is close to four bytes per
 #	object kept. However, pools may actually _save_ memory because of
 #	reduced memory thrashing in your malloc library.
-#
 #Default:
 # memory_pools_limit 5 MB
 
-#  TAG: forwarded_for	on|off
-#	If set, Squid will include your system's IP address or name
-#	in the HTTP requests it forwards.  By default it looks like
-#	this:
+#  TAG: forwarded_for	on|off|transparent|truncate|delete
+#	If set to "on", Squid will append your client's IP address
+#	in the HTTP requests it forwards. By default it looks like:
 #
 #		X-Forwarded-For: 192.1.2.3
 #
-#	If you disable this, it will appear as
+#	If set to "off", it will appear as
 #
 #		X-Forwarded-For: unknown
 #
+#	If set to "transparent", Squid will not alter the
+#	X-Forwarded-For header in any way.
+#
+#	If set to "delete", Squid will delete the entire
+#	X-Forwarded-For header.
+#
+#	If set to "truncate", Squid will remove all existing
+#	X-Forwarded-For entries, and place itself as the sole entry.
 #Default:
 # forwarded_for on
 
@@ -4539,6 +5460,7 @@ icp_port 3130
 #		offline_toggle *
 #		pconn
 #		peer_select
+#		reconfigure *
 #		redirector
 #		refresh
 #		server_list
@@ -4562,14 +5484,12 @@ icp_port 3130
 # cachemgr_passwd secret shutdown
 # cachemgr_passwd lesssssssecret info stats/objects
 # cachemgr_passwd disable all
-#
 #Default:
 # none
 
 #  TAG: client_db	on|off
 #	If you want to disable collecting per-client statistics,
 #	turn off client_db here.
-#
 #Default:
 # client_db on
 
@@ -4582,7 +5502,6 @@ icp_port 3130
 #
 #	By default (off), squid may return a Not Modified response
 #	based on the age of the cached version.
-#
 #Default:
 # refresh_all_ims off
 
@@ -4594,7 +5513,6 @@ icp_port 3130
 #	causes.
 #
 #	see also refresh_pattern for a more selective approach.
-#
 #Default:
 # reload_into_ims off
 
@@ -4609,7 +5527,6 @@ icp_port 3130
 #
 #	Note: This is in addition to the request re-forwarding which
 #	takes place if Squid fails to get a satisfying response.
-#
 #Default:
 # maximum_single_addr_tries 1
 
@@ -4618,14 +5535,12 @@ icp_port 3130
 #	receiving an error response. This is mainly useful if you
 #	are in a complex cache hierarchy to work around access
 #	control errors.
-#
 #Default:
 # retry_on_error off
 
 #  TAG: as_whois_server
 #	WHOIS server to query for AS numbers.  NOTE: AS numbers are
 #	queried only when Squid starts up, not for every request.
-#
 #Default:
 # as_whois_server whois.ra.net
 # as_whois_server whois.ra.net
@@ -4633,7 +5548,6 @@ icp_port 3130
 #  TAG: offline_mode
 #	Enable this option and Squid will never try to validate cached
 #	objects.
-#
 #Default:
 # offline_mode off
 
@@ -4656,42 +5570,30 @@ icp_port 3130
 #	chop:	The request is allowed and the URI is chopped at the
 #		first whitespace.  This might also be considered a
 #		violation.
-#
 #Default:
 # uri_whitespace strip
 
-#  TAG: coredump_dir
-#	By default Squid leaves core files in the directory from where
-#	it was started. If you set 'coredump_dir' to a directory
-#	that exists, Squid will chdir() to that directory at startup
-#	and coredump files will be left there.
-#
-#Default:
-# coredump_dir none
-#
-# Leave coredumps in the first cache dir
-coredump_dir /var/log/squid
-
 #  TAG: chroot
-#	Use this to have Squid do a chroot() while initializing.  This
-#	also causes Squid to fully drop root privileges after
-#	initializing.  This means, for example, if you use a HTTP
-#	port less than 1024 and try to reconfigure, you will may get an
-#	error saying that Squid can not open the port.
-#
+#	Specifies a directory where Squid should do a chroot() while
+#	initializing.  This also causes Squid to fully drop root
+#	privileges after initializing.  This means, for example, if you
+#	use a HTTP port less than 1024 and try to reconfigure, you may
+#	get an error saying that Squid can not open the port.
 #Default:
 # none
 
 #  TAG: balance_on_multiple_ip
+#	Modern IP resolvers in squid sort lookup results by preferred access.
+#	By default squid will use these IP in order and only rotates to
+#	the next listed when the most preffered fails.
+#
 #	Some load balancing servers based on round robin DNS have been
 #	found not to preserve user session state across requests
 #	to different IP addresses.
 #
-#	By default Squid rotates IP's per request. By disabling
-#	this directive only connection failure triggers rotation.
-#
+#	Enabling this directive Squid rotates IP's per request.
 #Default:
-# balance_on_multiple_ip on
+# balance_on_multiple_ip off
 
 #  TAG: pipeline_prefetch
 #	To boost the performance of pipelined requests to closer
@@ -4700,7 +5602,6 @@ coredump_dir /var/log/squid
 #
 #	Defaults to off for bandwidth management and access logging
 #	reasons.
-#
 #Default:
 # pipeline_prefetch off
 
@@ -4708,7 +5609,6 @@ coredump_dir /var/log/squid
 #	If the one-minute median response time exceeds this value,
 #	Squid prints a WARNING with debug level 0 to get the
 #	administrators attention.  The value is in milliseconds.
-#
 #Default:
 # high_response_time_warning 0
 
@@ -4717,7 +5617,6 @@ coredump_dir /var/log/squid
 #	value, Squid prints a WARNING with debug level 0 to get
 #	the administrators attention.  The value is in page faults
 #	per second.
-#
 #Default:
 # high_page_fault_warning 0
 
@@ -4725,7 +5624,6 @@ coredump_dir /var/log/squid
 #	If the memory usage (as determined by mallinfo) exceeds
 #	this amount, Squid prints a WARNING with debug level 0 to get
 #	the administrators attention.
-#
 #Default:
 # high_memory_warning 0 KB
 
@@ -4740,7 +5638,26 @@ coredump_dir /var/log/squid
 #	until all the child processes have been started.
 #	On Windows value less then 1000 (1 milliseconds) are
 #	rounded to 1000.
-#
 #Default:
 # sleep_after_fork 0
 
+#  TAG: windows_ipaddrchangemonitor	on|off
+#	On Windows Squid by default will monitor IP address changes and will 
+#	reconfigure itself after any detected event. This is very useful for
+#	proxies connected to internet with dial-up interfaces.
+#	In some cases (a Proxy server acting as VPN gateway is one) it could be
+#	desiderable to disable this behaviour setting this to 'off'.
+#	Note: after changing this, Squid service must be restarted.
+#Default:
+# windows_ipaddrchangemonitor on
+
+#  TAG: max_filedescriptors
+#	The maximum number of filedescriptors supported.
+#
+#	The default "0" means Squid inherits the current ulimit setting.
+#
+#	Note: Changing this requires a restart of Squid. Also
+#	not all comm loops supports large values.
+#Default:
+# max_filedescriptors 0
+