Cherry pick e28b0b5c5e992fbbac00981e94c946d2c29ec8d5: Move all of the auth configurat...

Cherry pick e28b0b5c5e992fbbac00981e94c946d2c29ec8d5: Move all of the auth configuration values into a config file

* includes/auth/auth.php:
(Authentication::_setupDatabase): Create the database object in this method using the config values
* includes/auth/auth_default.php:
* includes/auth/auth_drupal.php:
* includes/auth/auth_phpbb2.php:
* includes/auth/auth_vbulletin.php:
(Authentication*::_setupDatabase): Remove the db creation from here and just call parent::
* includes/auth/config.php.new: New file

Conflicts:

	includes/auth/auth_default.php
	includes/auth/auth_drupal.php
	includes/auth/auth_phpbb2.php
	includes/auth/auth_vbulletin.php