Author: Zig Tan
MDL-61568 repository_webdav: Implement null privacy provider
http://git.moodle.org/gw?p=moodle.git;a=commit;h=66208cc7505a7745a096320233791e901bd408f6
http://github.com/moodle/moodle/commit/66208cc7505a7745a096320233791e901bd408f6
+ 3.4 en [privacy:metadata,repository_webdav]