in pfxlist_onlink_check, checked whether there is a router that does not advertise any prefixes even if there's no prefix with a reachable router. this addresses the case that we've received a prefix but the advertising router has been dead.
in pfxlist_onlink_check, checked whether there is a router that does not
advertise any prefixes even if there's no prefix with a reachable router.
this addresses the case that we've received a prefix but the advertising router
has been dead.

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