mod_cloud_notify: Fix handling of push_queue
smacks-hibernating while the push_queue had a timer running resulted
in push not working for this session anymore.
This module helps reduces power usage of inactive mobile clients while
another client is actively used. E.g. in the case of chatting on a
desktop computer, instantly pushing messages to a phone in someones
pocket is not the best use of radio time.
Works with [mod_csi_simple][doc:modules:mod_csi_simple] which is
included with Prosody since 0.11