message: Config: open log file in append-mode.
diff: @@ -499,7 +499,7 @@ void saveConfigToFile(Config const& _config, FileSystem::path const& _path)
  ec.message())};
  }
  - auto ofs = ofstream{_path.string(), ios::trunc};
  + auto ofs = ofstream{_path.string(), ios::app};
  if (!ofs.good())
  throw runtime_error{ "Unable to create config file." };
  