K 10 svn:author V 2 kp K 8 svn:date V 27 2015-12-21T20:29:55.737005Z K 7 svn:log V 351 MFC r292219: inet6: Do not assume every interface has ip6 enabled. Certain interfaces (e.g. pfsync0) do not have ip6 addresses (in other words, ifp->if_afdata[AF_INET6] is NULL). Ensure we don't panic when the MTU is updated. pfsync interfaces will never have ip6 support, because it's explicitly disabled in in6_domifattach(). PR: 205194 END