Author: Michael Hawkins
MDL-69559 course: Add capability and access checks for course download
http://git.moodle.org/gw?p=moodle.git;a=commit;h=eb54686500544054a888872618fa93920df47d23
http://github.com/moodle/moodle/commit/eb54686500544054a888872618fa93920df47d23
+ 4.0 en [course:downloadcoursecontent,core_role]