Password Re-Use Options

As a cPanel admin I would like the ability to prevent password re-use for email and cpanel accounts. This would add to the current password policy options and better enable enforcement of those policies.

Currently we can set password policies so users are required to change their password when they log in to the webmail or cpanel interfaces. The options force the users to change their password but nothing stops them from changing a password and then just changing it back to their "old password"

WHM/cPanel should add an option to remember a configurable number of hashed passwords and prevent the same password from being re-used when either the system policy forces a change or when the user opts to change their own password.

This option would then act as a deterrent and prevention to users who simply change their passwords back to a previously used (possibly not secure) password.