ipf_rx_delete
rv = ipf_rx_delete(head, &stp->dst, &stp->mask);
rn = ipf_rx_delete(rnh, &af, &mask);
ptr->deladdr = ipf_rx_delete;
extern ipf_rdx_node_t *ipf_rx_delete(ipf_rdx_head_t *, addrfamily_t *,