Author: Shamim Rezaie
MDL-62005 block_comments: Add implementation of Privacy API
http://git.moodle.org/gw?p=moodle.git;a=commit;h=31b76f4f59dce82a2fc8c8119905301465e01ebe
http://github.com/moodle/moodle/commit/31b76f4f59dce82a2fc8c8119905301465e01ebe
+ 3.5 en [privacy:metadata:core_comment,block_comments]