Fix for: #3838 UFW Firewall detected but not set in ispconfig System > Serv...

Till Brehm

2016-05-26 bea23a5e79fba96481f77c62555f2d8b86283305

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ALTER TABLE `web_domain` ADD `last_quota_notification` DATE NULL DEFAULT NULL;
ALTER TABLE `mail_user` ADD `last_quota_notification` DATE NULL DEFAULT NULL;