Since we do not currently distinguish between "program name" and "tag" when parsing, and since some programs include '[pid]' as part of the syslog tag, we need the TagMatcher to do a prefix match instead of an exact match until this is handled in SyslogMsg.
Since we do not currently distinguish between "program name" and "tag" when parsing, and since some programs include '[pid]' as part of the syslog tag, we need the TagMatcher to do a prefix match instead of an exact match until this is handled in SyslogMsg.