Cleanup zc async

cookbook, Plone

For my own reference, as I had to do a cleanup of zc.async tasks. The interface was too slow.

# bin/zeo_client debug

>>> queue = app._p_jar.root()['zc.async']['']
>>> from zc.async.queue import Queue
>>> Queue.__init__(queue)
>>> import transaction
>>> transaction.commit()

#for i in range(len(queue)):
#    queue.pull(0)