rib_walk_del
void rib_walk_del(u_int fibnum, int family, rib_filter_f_t *filter_f,
rib_walk_del(fibnum, family, filter_f, arg, 0);
rib_walk_del(fibnum, i, filter_f, arg, 0);
rib_walk_del(rnh->rib_fibnum, rnh->rib_family, expire_route,