Author: Zig Tan
MDL-61568 repository_areafiles: Implement null privacy provider
http://git.moodle.org/gw?p=moodle.git;a=commit;h=cfca487f1fe96f87f6f8249f18c4a4e98902916b
http://github.com/moodle/moodle/commit/cfca487f1fe96f87f6f8249f18c4a4e98902916b
+ 3.5 en [privacy:metadata,repository_areafiles]