Author: Mark Nelson
MDL-55637 core_message: display icon for blocked users
http://git.moodle.org/gw?p=moodle.git;a=commit;h=dd0c1403a17825606e1e8e01085dc118577bb474
http://github.com/moodle/moodle/commit/dd0c1403a17825606e1e8e01085dc118577bb474
+ 3.2 en [contactblocked,core_message]