Author: David Woloszyn
MDL-81506 core_enrol: New capability to edit the welcome message
http://git.moodle.org/gw?p=moodle.git;a=commit;h=d43da95ed66b771b8ced61e6f13d0f5630f94f36
http://github.com/moodle/moodle/commit/d43da95ed66b771b8ced61e6f13d0f5630f94f36
+ 4.5 en [course:editcoursewelcomemessage,core_role]