wicd: fix dhclient interaction

wicd used to write dhclient config file into $out/var/lib/wicd directory attempting
to change nix-store. That didn't work and thats why we couldn't use dhclient.
With this patch wicd will generate temporary file name for this purpose. File is
generated each time the daemon starts.

pkgs/tools/networking/wicd/default.nix

@@ -16,7 +16,14 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ python ];
 
-  patches = [ ./no-var-install.patch ./no-trans.patch ./mkdir-networks.patch ./pygtk.patch ./no-optimization.patch ];
+  patches = [
+    ./no-var-install.patch
+    ./no-trans.patch 
+    #./mkdir-networks.patch
+    ./pygtk.patch
+    ./no-optimization.patch
+    ./dhclient.patch 
+    ];
 
   # Should I be using pygtk's propogated build inputs?
   # !!! Should use makeWrapper.