Author: Michael Hawkins
MDL-69559 course: Add course setting and cap to control course downloads
http://git.moodle.org/gw?p=moodle.git;a=commit;h=840bcd88104b17b79b808a4abb329c441f079383
http://github.com/moodle/moodle/commit/840bcd88104b17b79b808a4abb329c441f079383
+ 4.0 en [sitedefaultspecified,core]
+ 4.0 en [course:configuredownloadcontent,core_role]