0001-MFC-r232865-r232868-and-r233478.patch
http://svnweb.freebsd.org/base?view=revision&revision=234637

ipfw_forward_ipv6.diff (based on)
http://www.freebsd.org/cgi/query-pr.cgi?pr=117214
http://people.freebsd.org/~bz/20110719-01-ipfw-fwd-ipv6-pr117214.diff