const char *mg_unpack(const char *path, size_t *size, time_t *mtime) {
  (void) path, (void) size, (void) mtime;
  return NULL;
}
const char *mg_unpack(const char *path, size_t *size, time_t *mtime) {
  (void) path, (void) size, (void) mtime;
  return NULL;
}