Put comments in the default VCL to make people stop frobbing stuff

we don't support yet.



git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@3186 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/default.vcl

@@ -109,14 +109,17 @@ sub vcl_deliver {
 }
 
 sub vcl_discard {
+    /* XXX: Do not redefine vcl_discard{}, it is not yet supported */
     discard;
 }
 
 sub vcl_prefetch {
+    /* XXX: Do not redefine vcl_prefetch{}, it is not yet supported */
     fetch;
 }
 
 sub vcl_timeout {
+    /* XXX: Do not redefine vcl_timeout{}, it is not yet supported */
     discard;
 }