Author: Charles Fulton
MDL-61161 course: grace period for classifying in progress courses
http://git.moodle.org/gw?p=moodle.git;a=commit;h=3b31d8c92cdbcab2938fc5ad07d5f6c8874b8b35
http://github.com/moodle/moodle/commit/3b31d8c92cdbcab2938fc5ad07d5f6c8874b8b35
+ 3.6 en [configcoursegraceperiodafter,core_admin]
+ 3.6 en [configcoursegraceperiodbefore,core_admin]
+ 3.6 en [coursegraceperiodafter,core_admin]
+ 3.6 en [coursegraceperiodbefore,core_admin]