Author: Matthew Hilton
MDL-67898 antivirus: Add check to admin settings
http://git.moodle.org/gw?p=moodle.git;a=commit;h=dc7953ccff545aebcbc5edc20b85365252d63775
http://github.com/moodle/moodle/commit/dc7953ccff545aebcbc5edc20b85365252d63775
+ 4.4 en [statuschecks,core]