(void) soreserve(so, head->so_snd.sb_hiwat, head->so_rcv.sb_hiwat);
soqinsque(head, so, soqueue);
if ((*so->so_proto->pr_usrreq)(so, PRU_ATTACH,
(void) soreserve(so, head->so_snd.sb_hiwat, head->so_rcv.sb_hiwat);
soqinsque(head, so, soqueue);
if ((*so->so_proto->pr_usrreq)(so, PRU_ATTACH,