nd_opts_list
TAILQ_INIT(&ndopts.nd_opts_list);
TAILQ_FOREACH(optp, &ndopts.nd_opts_list, next)
TAILQ_INSERT_TAIL(&ndopts->nd_opts_list, pfxlist, next);
while ((opt = TAILQ_FIRST(&ndopts->nd_opts_list)) != NULL) {
TAILQ_REMOVE(&ndopts->nd_opts_list, opt, next);
TAILQ_INIT(&ndopts.nd_opts_list);