@3.4 Update classes/model/auth/user.php

Whats the Idea behin that?
Actually if i want to use Auth i have to extend the class with Kohanas Cascading Filesystem and have to overwrite create_user and update_user to add custom extra Validations. On this way i just need to overwrite extra_rules, get_password_validation is not even needed, just for backward compability.

Why do i need Extra validation? For example if i want to create new user i wish that user accept Terms and Conditions. Then on update_user i wish that user enter the old password before making new one so old password must match. By Creating user i could add name and surname fields to Registration form and want that they were not empty.. there are more examples so in my opinion this extension would make implementing extra validation easier