Merge branch 'master' of http://git.ispconfig.org/ispconfig/ispconfig3

Florian Schaal

2015-12-20 dedf5feaa2cf3072e90ac2bf2ef3885facd2e1a6

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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;