don't crash on trying to change IP interface for Beremiz_service using taskbar icon if IP wasn't previously


By default IP is not set (None) and service listen only on localhost interface.

start/stop from taskbar icon only if PLC is stopped/started

close Pyro socket after daemon stop


without that socket port is open after daemon shutdown.
As a result if you restart daemon with new settings (service name, for example),
it can't listen on already used port and opens the next free TCP port
regardless of requested settings.