Fixed: FS#3287 - Fix issue with empty .zip files in .zip mode of the backup...

Marius Cramer

2014-01-28 f753744a1ff4309771a5faf8d9002d7b211b9dd4

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ALTER TABLE `dns_slave` DROP INDEX `origin`;
ALTER TABLE `dns_slave` ADD CONSTRAINT `slave` UNIQUE (`origin`,`server_id`);