Fixed: FS#3222 - Backup cleaner bug

Till Brehm

2014-02-16 b7899214010fbb4938cde2fba0ded4c38b893de6

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