Author: Charles Fulton
MDL-372 forum: support for pinned discussion topics
http://git.moodle.org/gw?p=moodle.git;a=commit;h=87b007b4ddab60699144bba59a1d118aaac97922
http://github.com/moodle/moodle/commit/87b007b4ddab60699144bba59a1d118aaac97922
+ 3.1 en [discussionpin,mod_forum]
+ 3.1 en [discussionpinned,mod_forum]
+ 3.1 en [discussionunpin,mod_forum]
+ 3.1 en [eventdiscussionpinned,mod_forum]
+ 3.1 en [eventdiscussionunpinned,mod_forum]
+ 3.1 en [forum:pindiscussions,mod_forum]