Hello everyone,

 Looking through the code it appears that txfax/rxfax automatically
hangup channels when they're called and set a hangup cause that more
or less makes sense depending on how the fax went.  My question is -
can I have them not hangup the channel automatically so I can continue
execution somehow?  Alternatively, can I somehow continue execution
based on the hangup cause?  I'm thinking something like
api_hangup_hook that has access to the hangup/fax status.