Catch the standard Unix SIGTERM kill signal and do a graceful shutdown of PyBitmessage.
Catch the standard Unix SIGTERM kill signal and do a graceful shutdown of PyBitmessage.

We already do this for the SIGINT kill signal. The change allows us to do a clean
shutdown of PyBitmessage when its process has been separated from the terminal.

torifier/PyBitmessage,JosephGoulden/PyBitmessageF2F,mailchuck/PyBitmessage,timothyparez/PyBitmessage,rzr/PyBitmessage,timothyparez/PyBitmessage,kyucrane/PyBitmessage,metamarcdw/PyBitmessage-I2P,lightrabbit/PyBitmessage,rzr/PyBitmessage,gnu3ra/PyBitmessage,debguy0x/PyBitmessage,lightrabbit/PyBitmessage,hb9kns/PyBitmessage,JosephGoulden/PyBitmessageF2F,Atheros1/PyBitmessage,Atheros1/PyBitmessage,xeddmc/PyBitmessage,xeddmc/PyBitmessage,lightrabbit/PyBitmessage,bmng-dev/PyBitmessage,mailchuck/PyBitmessage,bmng-dev/PyBitmessage,debguy0x/PyBitmessage,Atheros1/PyBitmessage,Atheros1/PyBitmessage,hb9kns/PyBitmessage,bmng-dev/PyBitmessage,krytarowski/PyBitmessage,torifier/PyBitmessage,timothyparez/PyBitmessage,Erkan-Yilmaz/PyBitmessage,mailchuck/PyBitmessage,torifier/PyBitmessage,gnu3ra/PyBitmessage,kyucrane/PyBitmessage,torifier/PyBitmessage,debguy0x/PyBitmessage,Erkan-Yilmaz/PyBitmessage,metamarcdw/PyBitmessage-I2P,timothyparez/PyBitmessage,krytarowski/PyBitmessage,lightrabbit/PyBitmessage,hb9kns/PyBitmessage,mailchuck/PyBitmessage,hb9kns/PyBitmessage,debguy0x/PyBitmessage