Revert "nixpkgs: remove tsocks"

torsocks and tsocks are not equivalent. torsocks needs a
tor proxy for DNS, tsocks do not.

This reverts commit 1ef6470f15.

tsocks: adding myself as maintainer

pkgs/development/libraries/tsocks/default.nix

@@ -0,0 +1,26 @@
+{ stdenv, fetchurl }:
+stdenv.mkDerivation rec {
+  name = "tsocks-${version}";
+  version = "1.8beta5";
+
+  src = fetchurl {
+    url = "mirror://sourceforge/tsocks/${name}.tar.gz";
+    sha256 = "0ixkymiph771dcdzvssi9dr2pk1bzaw9zv85riv3xl40mzspx7c4";
+  };
+
+  patches = [ ./poll.patch ];
+
+  preConfigure = ''
+    sed -i -e "s,\\\/usr,"$(echo $out|sed -e "s,\\/,\\\\\\\/,g")",g" tsocks
+    substituteInPlace tsocks --replace /usr $out
+    export configureFlags="$configureFlags --libdir=$out/lib"
+  '';
+
+  meta = with stdenv.lib; {
+    description = "Transparent SOCKS v4 proxying library";
+    homepage = http://tsocks.sourceforge.net/;
+    license = stdenv.lib.licenses.gpl2;
+    maintainers = with maintainers; [ edwtjo phreedom ];
+    platforms = platforms.linux;
+  };
+}