Merge branch 'feature/backup_stats' into 'master'

Marius Cramer

2015-01-05 307a78622c6a6b9b1a5a1dc51a8d54cf95e8a3c2

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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;