no sigbreak on linux

[Robert Olson]

(moonbeam) % python bin/VenueServer.py
bound to port  8000
GSI server listening on 8000
Service running at: https://moonbeam.mcs.anl.gov:8000/VenueServer
Traceback (most recent call last):
   File "bin/VenueServer.py", line 50, in ?
     signal.signal(signal.SIGBREAK, SignalHandler)
AttributeError: 'module' object has no attribute 'SIGBREAK'