Merge branch 'stable-3.1'

Marius Burkard

2016-02-19 51c155ab6f8c0eb1ea4ad75aaba6f6e1cecc3885

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