Improved input validation for settings that are acessible by the admin user.

Till Brehm

2014-08-01 e98a15838d8aed330ac7b1bb373b54524ea2a269

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