Fixed: Issue #3751 ISPConfig Login fails on Nginx servers in 3.1-dev version.

Till Brehm

2016-02-09 ca9ac33c8ac8e6fa2c695e37af627e747a332999

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