Author: Frederic Massart
MDL-48383 task: Indicate when a task will not run if plugin is disabled
http://git.moodle.org/gw?p=moodle.git;a=commit;h=18247eb09098b940ba09dad750a2ddde524aebbf
http://github.com/moodle/moodle/commit/18247eb09098b940ba09dad750a2ddde524aebbf
+ 2.9 en [plugindisabled,tool_task]
+ 2.9 en [taskdisabled,tool_task]