Author: Zig Tan
MDL-61568 repository_areafiles: Implement null privacy provider
http://git.moodle.org/gw?p=moodle.git;a=commit;h=c585e4fc600d53a038caf3e0ab276439a153d152
http://github.com/moodle/moodle/commit/c585e4fc600d53a038caf3e0ab276439a153d152
+ 3.3 en [privacy:metadata,repository_areafiles]