Add support for reviewing archived logs

[TechnologyClassroom]

Add optional support for reviewing older logs in addition to reviewing recent logs.

logrotate will usually archive logs that are older than a few days. Archived logs are typically in gzip or bz format.

This command will output all of the the gzip syslog logs:

zcat -f /var/log/syslo*

[TechnologyClassroom]

This command will output all of the the bzip syslog logs:

bzcat -f /var/log/syslo*