Fix for FS#3857 .ssh key directory problem.

Till Brehm

2015-06-03 3fb9be68159f94f4fe9f6fac579b31b5533b6dc7

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