message: Ignore disable_mpmd arg if we see it
diff: @@ -300,6 +300,11 @@ static void ParseArgs(int argc, char **argv)
  {
  EarlyExit++;
  }
  + else if (std::string(argv[1]) == "--disable_mpmd")
  + {
  + // someone else should have eaten this arg, but if it gets here,
  + // ignore it
  + }
  else
  {
  if (bare_arg == 0)
  