varnish: adding version 2.1.x

pkgs/servers/varnish/2.1.nix

@@ -0,0 +1,21 @@
+{ stdenv, fetchurl, pcre, libxslt, groff, ncurses, pkgconfig }:
+
+stdenv.mkDerivation rec {
+  version = "2.1.5";
+  name = "varnish-${version}";
+
+  src = fetchurl {
+    url = "http://repo.varnish-cache.org/source/${name}.tar.gz";
+    sha256 = "10zgwn482gfmfb7n6xwi7p841bs3j58jnk55wg83b85d2jz4k01d";
+  };
+
+  buildInputs = [ pcre libxslt groff ncurses pkgconfig ];
+
+  meta = {
+    description = "Web application accelerator also known as a caching HTTP reverse proxy";
+    homepage = "https://www.varnish-cache.org";
+    license = stdenv.lib.licenses.bsd2;
+    maintainers = [ stdenv.lib.maintainers.garbas ];
+    platforms = stdenv.lib.platforms.linux;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -2042,6 +2042,8 @@ let
 
   varnish = callPackage ../servers/varnish { };
 
+  varnish2 = callPackage ../servers/varnish/2.1.nix { };
+
   venus = callPackage ../tools/misc/venus {
     python = python27;
   };