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=737a5f7fe482a20dc60aba2c59fe49bd6854d6c7
http://github.com/moodle/moodle/commit/737a5f7fe482a20dc60aba2c59fe49bd6854d6c7
+ 2.8 en [plugindisabled,tool_task]
+ 2.8 en [taskdisabled,tool_task]