Allow /etc/default/celeryd to define additional options.
Allow /etc/default/celeryd to define additional options.

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