allow to define macros in the config file

Macros can be defined at the top of the configuration file:

	dir = "/var/gemini"
	cert = "/etc/keys"

and re-used later, for example

	server "foo" {
		root "$dir/foo"       # -> /var/gemini/foo
		cert "$cert/foo.pem" # -> /etc/keys/foo.pem
	}

1 files changed, 2 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index cc360c4..3801306 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,7 @@
 2021-06-29  Omar Polo  <op@omarpolo.com>
 
+	* parse.y (yylex): allow to define macros in the config file
+
 	* gmid.c (main): use getopt_long, add --help as synonym of -h and -V/--version
 
 2021-06-17  Omar Polo  <op@omarpolo.com>