I've been getting an email from my server the last few days with the message
Subject: Cron <root@vps> /usr/bin/test -x /usr/local/cpanel/bin/optimizefs && /usr/local/cpanel/bin/optimizefs
"Using unique option prefix pass instead of password is deprecated and will be removed in a future release. Please use the full name instead."
Google this term and found some clues . . . but
I checked my.cnf and found no mention of pass