bzero(newstates, newn * sizeof (struct if_ppp_t *));
bcopy(ifs, newifs, ppp_nalloc * sizeof(struct ifnet *));
bcopy(states, newstates, ppp_nalloc * sizeof(if_ppp_t *));
bzero(newstates, newn * sizeof (struct if_ppp_t *));
bcopy(ifs, newifs, ppp_nalloc * sizeof(struct ifnet *));
bcopy(states, newstates, ppp_nalloc * sizeof(if_ppp_t *));