Author: Paul Holden
MDL-73598 reportbuilder: feature switch for custom reports.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=335012580bfa355a673d5dfd8a93a93fa2fdce81
http://github.com/moodle/moodle/commit/335012580bfa355a673d5dfd8a93a93fa2fdce81
+ 4.0 en [enablecustomreports,core_reportbuilder]
+ 4.0 en [enablecustomreports_desc,core_reportbuilder]