code: function underload(cmdlineName, configName) {
    if (!program[cmdlineName] && config.has(configName)) {
      program[cmdlineName] = config.get(configName);
    }
  }
docs: Load the config file option if not overloaded by the command line.
  
  @param cmdlineName: The command line option name
  @param configName: The config file option name