escapeshellarg document root for security reasons (fixes #3984)

Pascal Dreissen

2016-07-08 e8dda462f3b02628b4d878ed2c133f1f04d26a50

1
ALTER TABLE  `sys_session` CHANGE  `session_id`  `session_id` VARCHAR( 64 ) CHARACTER SET latin1 COLLATE latin1_swedish_ci NOT NULL;