nr_link
TAILQ_INSERT_HEAD(&hostp->nh_rpchc, rpcp, nr_link);
TAILQ_REMOVE(&hostp->nh_rpchc, rpcp, nr_link);
TAILQ_FOREACH(rpcp, &hostp->nh_rpchc, nr_link) {
TAILQ_REMOVE(&hostp->nh_rpchc, rpcp, nr_link);