Make run() of multiple components work on Windows (#986)
Make run() of multiple components work on Windows (#986)

At the other places where add_signal_handler is called this exception is
also handled like this.
crossbario/autobahn-python,tavendo/AutobahnPython,oberstet/autobahn-python,oberstet/autobahn-python,oberstet/autobahn-python,crossbario/autobahn-python,crossbario/autobahn-python