Merge branch 'darkalex/ispconfig3-mailsec-sendas' into stable-3.1

Marius Burkard

2016-01-20 6332aca4c482615a2168b3afad3170954b9f36a6

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ALTER TABLE `shell_user` CHANGE `ssh_rsa` `ssh_rsa` TEXT CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL;