patchset to enable user namespaces

[Serge Hallyn]

Hi,

The final patches needed to resolve conflicts between XFS and user
namespaces are in 3.12.  I've backported them to saucy at

	http://kernel.ubuntu.com/git?p=serge/ubuntu-saucy.git;a=summary # m.sep23.xfs2

This has 7 patches cherrypicked from Linus' tree, one patch by
myself to add a sysctl, default off, to enable unprivileged use
of CLONE_NEWUSER, and a packaging patch to set CONFIG_USER_NS=y.

thanks,
-serge