static void sdb_concat_by_path(Sdb *s, const char *path) {
	Sdb *db = sdb_new(0, path, 0);
	sdb_merge(s, db);
	sdb_close(db);
	sdb_free(db);
}
static void sdb_concat_by_path(Sdb *s, const char *path) {
	Sdb *db = sdb_new(0, path, 0);
	sdb_merge(s, db);
	sdb_close(db);
	sdb_free(db);
}