Revert r555726: Support RFC5424/IETF syslog format. There is a better way to support RFC5424/IETF syslog format implemented in 12-STABLE, 13-STABLE, and 14-CURRENT. PR: 252613 Reported by: Boris Korzun <drtr0jan@yandex.ru> Reviewed by: Peter Czanik (CzP) <peter.czanik@oneidentity.com> Balabit (a OneIdentity company) / syslog-ng upstream