Fixed: Issue #3826 deletion of client do not remove mailinglists

Till Brehm

2016-04-18 5882e86f5d1057a123030922adfe3698c317ecb2

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