Checkmk Werk 13088: Handle old syslog messages without a tag.

ID: 13088 Title: Handle old syslog messages without a tag. Component: Event Console Level: 3 Class: Bug fix Version: 2.1.0i1 The event console could not parse a RFC-3164-style message where the CONTENT did not start with a TAG. The TAG is specified as optional, so we handle that case now, too.