nat64lsn_foreach
nat64lsn_foreach(nat64lsn_show_cb, name, set, 1);
nat64lsn_foreach(nat64lsn_states_cb, name, set, 1);
nat64lsn_foreach(nat64lsn_show_cb, name, set, 1);
nat64lsn_foreach(nat64lsn_destroy_cb, NULL, set, 0);
static int nat64lsn_foreach(nat64lsn_cb_t *f, const char *name, uint8_t set,