message: Fix datadir handling in bitcoin-cli
  This prevents premature tries to access or create the default datadir.
  This is useful when the -datadir option is specified and the default
  datadir is unreachable.
diff: @@ -123,7 +123,7 @@ static int AppInitRPC(int argc, char* argv[])
  }
  return EXIT_SUCCESS;
  }
  - if (!fs::is_directory(GetDataDir(false))) {
  + if (!CheckDataDirOption()) {
  tfm::format(std::cerr, "Error: Specified data directory \"%s\" does not exist.\n", gArgs.GetArg("-datadir", "").c_str());
  return EXIT_FAILURE;
  }
  