nlm_slreq_unregister
int nlm_slreq_unregister(struct nlm_host *,
(void) nlm_slreq_unregister(host, nvp, flp);
(void) nlm_slreq_unregister(host, nvp, flp);
(void) nlm_slreq_unregister(cb_data->hostp,
error = nlm_slreq_unregister(host, nvp, &fl);