Added support for git-stable branch (currently stable-3.1 branch) in ISPCon...

Till Brehm

2016-01-31 299f8ebfb16a2b40f4142d1b1ba175ed3160d834

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ALTER TABLE  `mail_user` ADD  `autoresponder_subject` VARCHAR(255) NOT NULL DEFAULT 'Out of office reply' AFTER  `autoresponder_end_date`;