add ability to proxy requests

Add to gmid the ability to forwad a request to another gemini server and
thus acting like a reverse proxy.  The current syntax for the config
file is

	server "example.com" {
		...
		proxy relay-to host:port
	}

Further options (like the use of custom certificates) are planned.

cf. github issue #7

1 files changed, 2 insertions, 0 deletions

diff --git a/gmid.c b/gmid.c
index e0c777a..7c2c7bd 100644
--- a/gmid.c
+++ b/gmid.c
@@ -302,6 +302,8 @@ free_config(void)
 			free((char*)l->block_fmt);
 			free((char*)l->dir);
 
+			free(l->proxy_host);
+
 			if (l->dirfd != -1)
 				close(l->dirfd);