* freebsd4: fix the bug IPv6 over vlan do not work when updating   freebsd4.4
* freebsd4: fix the bug IPv6 over vlan do not work when updating
  freebsd4.4

MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame