Author: Andrew Nicols
MDL-22077 forum: Update post.php to respect private replies
http://git.moodle.org/gw?p=moodle.git;a=commit;h=15dc885a8bad38540eb310c41d5ad32889a57d86
http://github.com/moodle/moodle/commit/15dc885a8bad38540eb310c41d5ad32889a57d86
+ 3.7 en [cannotdeletediscussioninsinglediscussion,mod_forum]