Added 3.Head version of Squid. Supports IPv6 servers.

svn path=/nixpkgs/trunk/; revision=11828

pkgs/servers/squid/3.head.nix

@@ -0,0 +1,24 @@
+args:
+( args.mkDerivationByConfiguration {
+    flagConfig = {
+      mandatory = { buildInputs = [ "perl" ]; };
+      # many options I don't know wether they should be default .. 
+    }; 
+
+    extraAttrs = co : {
+      name = "squid-3.0-stable5";
+
+      src = args.fetchurl {
+        url = http://www.squid-cache.org/Versions/v3/HEAD/squid-3.HEAD-20080424.tar.bz2;
+        sha256 = "0mqjq8112rjgn3nbpkg8iql32cnk5kiw8fmhj5gbqzbycbhaxjgz";
+      };
+
+      configureFlags = ["--enable-ipv6"];
+
+      meta = { 
+        description = "http-proxy";
+        homepage = "http://www.squid-cache.org";
+        license = "GPL2";
+      };
+  };
+} ) args