Author: Zig Tan
MDL-61568 repository_recent: Implement null privacy provider
http://git.moodle.org/gw?p=moodle.git;a=commit;h=6b318d7f2b481aee61590d45207590c17a34dc31
http://github.com/moodle/moodle/commit/6b318d7f2b481aee61590d45207590c17a34dc31
+ 3.3 en [privacy:metadata,repository_recent]