stunnel4/debian/stunnel4.logrotate

/var/log/stunnel4/*.log {
        daily
         missingok
         rotate 365
         compress
         delaycompress
         notifempty
         create 640 stunnel4 stunnel4
         sharedscripts
         postrotate
           /etc/init.d/stunnel4 reopen-logs > /dev/null
         endscript
}