Author: Mathew
MDL-24951 mod_forum: Check user capability to know what message to show.
If the user has the following capabilty: mod/forum:canposttomygroups then show them
the more technical of the strings. Otherwise we use something a bit easier for them to ask their
tutor or teacher about.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=0dbe9025b580309f83128ed350f9b34e106d23ee
http://github.com/moodle/moodle/commit/0dbe9025b580309f83128ed350f9b34e106d23ee
+ 3.7 en [cannotadddiscussiongroup,mod_forum]