Fix for gentoo: http://www.howtoforge.com/forums/showpost.php?p=321184&post...

Till Brehm

2014-11-06 d907c0ce889a71b1ac5fb49e8dd5229b9459bd0e

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