backup: change mounts to backup_dir_mount_cmd

Florian Schaal

2014-11-03 ea5eee59af75b1e26d7ab287b18afed6d557dc56

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ALTER TABLE  `sys_session` CHANGE  `session_id`  `session_id` VARCHAR( 64 ) CHARACTER SET latin1 COLLATE latin1_swedish_ci NOT NULL;