Fix for amavisd config permissions on CentOS 7.2

Till Brehm

2016-06-23 f496e926e7aae5459acb93714dfc77dac64e0e73

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