rib_init_sendwait
wdesc = rib_init_sendwait(msgid, cv_sig, qp);
wdesc = rib_init_sendwait(0, cv_sig, qp);
wdesc = rib_init_sendwait(0, cv_sig, qp);
static struct send_wid *rib_init_sendwait(uint32_t, int, rib_qp_t *);