merge_prefixspec
int merge_prefixspec(struct filter_prefix *,
if (merge_prefixspec(&$$->p, &$2) == -1) {
if (merge_prefixspec(&$$->p, &$2) == -1) {
if (merge_prefixspec(&$$->p, &$2) == -1) {
if (merge_prefixspec(&$$->p, &$2) == -1) {