Ok, it is in the /etc/logrotate.d/proftpd config file... the file contains the script below... I no longer even use proftpd, should I just get rid of this file and the xferlogs since they're no longer in use??
/var/log/xferlog {
compress
missingok
postrotate
test -f /var/lock/subsys/proftpd && /usr/bin/killall -HUP proftpd
endscript
}
/var/log/proftpd/*.log {
compress
missingok
postrotate
test -f /var/lock/subsys/proftpd && /usr/bin/killall -HUP proftpd
endscript
}