Re-add GNU TLS 2.12 - it does fix glib-networking

svn path=/nixpkgs/trunk/; revision=28853

pkgs/development/libraries/gnutls/2.12.nix

@@ -0,0 +1,54 @@
+{ fetchurl, stdenv, zlib, lzo, libtasn1, nettle
+, guileBindings, guile, pkgconfig }:
+
+assert guileBindings -> guile != null;
+
+stdenv.mkDerivation rec {
+
+  name = "gnutls-2.12.9";
+
+  src = fetchurl {
+    url = "mirror://gnu/gnutls/${name}.tar.bz2";
+    sha256 = "0ilfdyw6xr0w57aygmw1fvx56x2zh5la01y8bkx59crq927wk8bl";
+  };
+
+  configurePhase = ''
+    ./configure --prefix="$out"                                 \
+      --disable-dependency-tracking --enable-fast-install       \
+      --with-lzo --with-libtasn1-prefix="${libtasn1}"		\
+      --without-p11-kit                                         \
+      ${if guileBindings
+        then "--enable-guile --with-guile-site-dir=\"$out/share/guile/site\""
+        else ""}
+  '';
+
+  buildInputs = [ zlib lzo libtasn1 pkgconfig ]
+    ++ stdenv.lib.optional guileBindings guile;
+
+  propagatedBuildInputs = [ nettle ];
+
+  doCheck = true;
+
+  meta = {
+    description = "The GNU Transport Layer Security Library";
+
+    longDescription = ''
+       GnuTLS is a project that aims to develop a library which
+       provides a secure layer, over a reliable transport
+       layer. Currently the GnuTLS library implements the proposed
+       standards by the IETF's TLS working group.
+
+       Quoting from the TLS protocol specification:
+
+       "The TLS protocol provides communications privacy over the
+       Internet. The protocol allows client/server applications to
+       communicate in a way that is designed to prevent eavesdropping,
+       tampering, or message forgery."
+    '';
+
+    homepage = http://www.gnu.org/software/gnutls/;
+    license = "LGPLv2.1+";
+
+    maintainers = [ stdenv.lib.maintainers.ludo ];
+  };
+}