Author: Ryan Wyllie
MDL-56028 message: change forced to locked on preferences page
http://git.moodle.org/gw?p=moodle.git;a=commit;h=fadb8316585cf7f509fe128a6b3ef7a664c79257
http://github.com/moodle/moodle/commit/fadb8316585cf7f509fe128a6b3ef7a664c79257
+ 3.2 en [forced,core_message]