vpnc: added patch to fix the 'Error: either "to" is duplicate, or "ipid" is a garbage' bug

Further details are at:

  http://www.rz.uni-konstanz.de/activekb/questions/250/VPNC+unter+Ubuntu+11.10+%22Error%3A+either+%22to%22+is+duplicate%2C+or+%22ipid%22+is+a+garbage.%22

svn path=/nixpkgs/trunk/; revision=32712

pkgs/tools/networking/vpnc/default.nix

@@ -7,7 +7,7 @@ stdenv.mkDerivation rec {
     sha256 = "1128860lis89g1s21hqxvap2nq426c9j4bvgghncc1zj0ays7kj6";
   };
 
-  patches = [ ./makefile.patch ];
+  patches = [ ./makefile.patch ./vpnc-script.patch ];
 
   # The `etc/vpnc/vpnc-script' script relies on `which' and on
   # `ifconfig' as found in net-tools (not GNU Inetutils).

pkgs/tools/networking/vpnc/vpnc-script.patch

@@ -0,0 +1,12 @@
+diff -ubr vpnc-0.5.3-orig/vpnc-script.in vpnc-0.5.3/vpnc-script.in
+--- vpnc-0.5.3-orig/vpnc-script.in	2012-02-29 23:03:35.289636602 +0100
++++ vpnc-0.5.3/vpnc-script.in	2012-02-29 23:03:59.597307445 +0100
+@@ -116,7 +116,7 @@
+ 
+ if [ -n "$IPROUTE" ]; then
+ 	fix_ip_get_output () {
+-		sed 's/cache//;s/metric \?[0-9]\+ [0-9]\+//g;s/hoplimit [0-9]\+//g'
++		sed 's/cache//;s/metric \?[0-9]\+ [0-9]\+//g;s/hoplimit [0-9]\+//g;s/ipid 0x....//g'
+ 	}
+ 
+ 	set_vpngateway_route() {