Author: Jun Pataleta
MDL-61389 mod_forum: Descriptive aria-label for "Discuss this topic"
http://git.moodle.org/gw?p=moodle.git;a=commit;h=4d90df63d26f0d273f60441e0c8daffac59e4151
http://github.com/moodle/moodle/commit/4d90df63d26f0d273f60441e0c8daffac59e4151
+ 3.8 en [discusstopicname,mod_forum]