svoid mechList_completeLocalCopies() {
  for (S name, S md5 : mechListMD5s()) {
    if (mechList_localCopyHasMD5(name, md5))
      print("Up to date:  " + name);
    else {
      print("Downloading: " + name);
      serverMechList_raw_fresh(name);
    }
  }
}