First part of fix for issue #3896 - Unknown column 'default_mailserver' in ...

Till Brehm

2016-06-16 ffedcb9a80e8a3ff375993fc349d9ce969a1a4d7

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