The value of tmnxLogFilterParamsSubjectRegexp specifies the type
of string comparison to use to determine if the log event matches
the value of tmnxLogFilterParamsSubject. When the value of
tmnxLogFilterParamsSubjectRegexp is 'true', the string in
tmnxLogFilterParamsSubject is a regular expression string to be
matched against the subject string in the log event being filtered.
When it has a value of 'false', the string in
tmnxLogFilterParamsSubject is matched exactly by the event
filter.