Add mlmmj package and nixos module.

pkgs/servers/mail/mlmmj/default.nix

@@ -0,0 +1,21 @@
+{ stdenv, fetchurl, pkgconfig }:
+
+stdenv.mkDerivation rec {
+
+  name = "mlmmj-${version}";
+  version = "1.2.18.1";
+
+  src = fetchurl {
+    url = "http://mlmmj.org/releases/${name}.tar.gz";
+    sha256 = "336b6b20a6d7f0dcdc7445ecea0fe4bdacee241f624fcc710b4341780f35e383";
+  };
+
+  meta = with stdenv.lib; {
+    homepage = http://mlmmj.org;
+    description = "Mailing List Management Made Joyful";
+    maintainers = [ maintainers.edwtjo ];
+    platforms = platforms.linux;
+    license = licenses.mit;
+  };
+
+}