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

Florian Schaal

2016-01-16 f0b03be2a39f1bc31fa3488bd457fadb878a32cd

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ALTER TABLE `client` ADD `default_slave_dnsserver` INT( 11 ) UNSIGNED NOT NULL DEFAULT '1' AFTER `limit_dns_zone`;