Author: Shamim Rezaie
MDL-62005 block_comments: Add implementation of Privacy API
http://git.moodle.org/gw?p=moodle.git;a=commit;h=ac2e6921cb6e4017bb9eb01a07b5eb051cdbc962
http://github.com/moodle/moodle/commit/ac2e6921cb6e4017bb9eb01a07b5eb051cdbc962
+ 3.4 en [privacy:metadata:core_comment,block_comments]