Merge remote-tracking branch 'ispc/master'

Marius Cramer

2014-08-13 f382f091aa97d10056b4c433aa55298fece010d4

 install/sql/incremental/upd_0052.sql

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