Merge branch 'stable-3.1'

Marius Burkard

2016-01-26 ab3c7dfb89aee966d336c2d68d0220d5a1b7893e

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