1. Create a newsyslog.conf file that includes a log file (e.g.,
rfc5424.log) that specifies the RFC5424 format flag and a log file
(e.g., legacy.log) that does not specify the RFC5424 format flag.
2. Invoke newsyslog to rotate the log files (either using the force
flag or appropriate time or size parameters in newsyslog.conf).
3. Examine the log files to ensure that the format is in RFC5424
format for that log file so configured and that the format is in
the traditional (RFC3164) format for the other log file.