Author: Zig Tan
MDL-61568 repository_recent: Implement null privacy provider
http://git.moodle.org/gw?p=moodle.git;a=commit;h=7eb62206da2014a245e64aec90b2308bbc39da26
http://github.com/moodle/moodle/commit/7eb62206da2014a245e64aec90b2308bbc39da26
+ 3.4 en [privacy:metadata,repository_recent]