Pad filenames starting with a single digit year (e.g. 1, 2, etc) with a zero while leaving filesnames starting with two digit years (e.g. 11, 12) untouched.
Setup a new backup server and getting the following error from Cron in /etc/cron.daily/logrotate:
error: error running shared postrotate script for /var/log/mysql.log /var/log/mysql/mysql.log /var/log/mysql/mysql-slow.log run-parts: /etc/cron.daily/logrotate exited with return code 1