title: How to upgrade from MySQL old passwords to new Password system
body: <p>I have a lot of users (privilages) in mysql server 5.0 .
  I want to transfer all of them into new MySQL server 5.5 . But the passwords are in old format (in `mysql`.`user` table). So I want to convert all old passwords to new format.</p>
  
  <p>Is there any way to transfer and upgrading the MySQL passwords without changing them?</p>