Add our nullfs patch, which allows us to use sockets in a nullfs mount

This fixes the portsjail, allowing X applications to run jailed and still
talk to X via socket
Enable VIMAGE support in kernel
Change tag to 9-TRUEOS
Apply security advisory SA-13:05

http://www.freebsd.org/security/advisories/FreeBSD-SA-13:05.nfsserver.asc