Author: Zig Tan
MDL-61567 mod_page: Implement null provider mod_page
http://git.moodle.org/gw?p=moodle.git;a=commit;h=ef9c44ad7eeba4f4f14a7038501b2253957389d3
http://github.com/moodle/moodle/commit/ef9c44ad7eeba4f4f14a7038501b2253957389d3
+ 3.3 en [privacy:metadata,mod_page]