In password virtualmin driver removed support for username in format based on user alias (#1489332)

Conflicts:

	plugins/password/config.inc.php.dist
Display full attachment name using title attribute when name is too long to display (#1489320)

Conflicts:

	CHANGELOG
	program/steps/mail/show.inc
Hide Delivery Status Notification option when smtp_server is unset (#1489336)

Conflicts:

	CHANGELOG
	config/main.inc.php.dist
Fix setting domain in virtualmin password driver (#1489332)
Update changelog
Apply various IPAX fixes and add cleanup.sh script
Add IPAX configuration files
Temporary CSS fix