add feature to save rsyslogd queue content when external logging is misconfigured

ISSUE TYPE

• Feature Idea

SUMMARY

rsyslog does not save the queue content when external logging is misconfigured. In case of a 404 error on the external logging service, a buffer will not be kept and any log events will be lost. For example, one time 404 error from an external logging server, we lost log events until the external logging service is fixed.

Additionally, rsyslogd does not save the queue content on service shutdown. can we add such feature to store the queue on rsyslogd shutdown or restart.