code: public ServerBuilder accessLogger(String loggerName) {
          requireNonNull(loggerName, "loggerName");
          return accessLogger(LoggerFactory.getLogger(loggerName));
      }
docs: Sets the default access logger name for all {@link VirtualHost}s.
  The {@link VirtualHost}s which do not have an access logger specified by a {@link VirtualHostBuilder}
  will have the same access {@link Logger} named the {@code loggerName}
  when {@link ServerBuilder#build()} is called.