Upgrades Directory Reference

Files
file	AlterDatabaseToMultiByteCharset.php [code]
file	ChangeUserNotificationSettingsNamespace.php [code]
file	ContentOwnerSubscriptions.php [code]
file	DeleteDiagnosticsPlugin.php [code]
file	DeleteNotificationsPlugin.php [code]
file	MigrateACLNotificationPreferences.php [code]
file	NotificationsPrefix.php [code]