Author: Jordi Pujol Ahulló
MDL-70230 admin: add setting sched. task status
When defining settings that are used by scheduled tasks,
it is also useful, or even needed, to know the status
of that scheduled task to have the whole big picture of
that part of the system.
Based on the admin_setting_description, this new setting
reports its name, its status, a link to the configuration.
When adding a new setting of this type, the user can add
an extra description field to complete the whole meaning.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=9c4510a358cdcd192085d8d96c99acc571292dac
http://github.com/moodle/moodle/commit/9c4510a358cdcd192085d8d96c99acc571292dac
+ 4.0 en [task_status,core_admin]
+ 4.0 en [task_status_desc,core_admin]