Prepare addition of the nftables framework

The nftables framework will be added in linux kernel 3.13

Netfilter developer Eric Leblond told me there will be userspace tools releases
just after the linux 3.13 release. No deps change are expected.



git-svn-id: file:///srv/repos/svn-community/svn@103195 9fca08f4-af9d-4005-b8df-a31f2cc04f65