code: def syslog(logger_to_update=logger, facility=SysLogHandler.LOG_USER, disableStderrLogger=True):
      
      # remove internal loggers
      __remove_internal_loggers(logger_to_update, disableStderrLogger)
  
      # Setup logzero to only use the syslog handler with the specified facility
      syslog_handler = SysLogHandler(facility=facility)
      setattr(syslog_handler, LOGZERO_INTERNAL_LOGGER_ATTR, True)
      logger_to_update.addHandler(syslog_handler)
      return syslog_handler
docs: Setup logging to syslog and disable other internal loggers
      :param logger_to_update: the logger to enable syslog logging for
      :param facility: syslog facility to log to
      :param disableStderrLogger: should the default stderr logger be disabled? defaults to True
      :return the new SysLogHandler, which can be modified externally (e.g. for custom log level)