{$type}_password_expiry_days. This allows the $config variable to be updated
and everyones password will expire based on the new value. To implement
this, the password expiry column in the users table has been changed to
passwordset, and a PHP script is used to convert the expiry dates to set
dates (based on the _password_expiry_days)
- Cleanup the password entry checking
- Load all config variables for the db_update.php script. Just in case an
update script wants access to $config
