ip6_mrouter_done(): use if_allmulti(0) for diabling the multicast promiscuous mode for FreeBSD.
ip6_mrouter_done(): use if_allmulti(0) for diabling the multicast promiscuous
mode for FreeBSD.

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