Author: Michael Hawkins
MDL-69559 admin: Add course download admin settings and lang strings
http://git.moodle.org/gw?p=moodle.git;a=commit;h=11456d71f017d472e002a3e80c6ccb0a6604adb0
http://github.com/moodle/moodle/commit/11456d71f017d472e002a3e80c6ccb0a6604adb0
+ 4.0 en [downloadcoursecontentallowed,core_admin]
+ 4.0 en [downloadcoursecontentallowed_desc,core_admin]
+ 4.0 en [maxsizeperdownloadcoursefile,core_admin]
+ 4.0 en [maxsizeperdownloadcoursefile_desc,core_admin]
+ 4.0 en [downloadcoursecontent,core_course]
+ 4.0 en [downloadcoursecontent_help,core_course]
+ 4.0 en [enabledownloadcoursecontent,core_course]