Ignore the result of PeriodicTask's by default.
Ignore the result of PeriodicTask's by default.

ask/celery,WoLpH/celery,mitsuhiko/celery,cbrepo/celery,WoLpH/celery,mitsuhiko/celery,ask/celery,frac/celery,cbrepo/celery,frac/celery