Comment 2 for bug 1381129

I just came across to this:

==> /var/log/maas/pserv.log <==
2014-11-13 15:53:29-0500 [-] Timed during option negotiation process
2014-11-13 15:53:29-0500 [-] Timed during option negotiation process
2014-11-13 15:53:29-0500 [-] Unhandled Error
        Traceback (most recent call last):
          File "/usr/lib/python2.7/dist-packages/twisted/application/app.py", line 392, in startReactor
            self.config, oldstdout, oldstderr, self.profiler, reactor)
          File "/usr/lib/python2.7/dist-packages/twisted/application/app.py", line 313, in runReactorWithLogging
            reactor.run()
          File "/usr/lib/python2.7/dist-packages/twisted/internet/base.py", line 1192, in run
            self.mainLoop()
          File "/usr/lib/python2.7/dist-packages/twisted/internet/base.py", line 1201, in mainLoop
            self.runUntilCurrent()
        --- <exception caught here> ---
          File "/usr/lib/python2.7/dist-packages/twisted/internet/base.py", line 824, in runUntilCurrent
            call.func(*call.args, **call.kw)
          File "/usr/lib/python2.7/dist-packages/tftp/bootstrap.py", line 205, in timedOut
            self.cancel()
          File "/usr/lib/python2.7/dist-packages/tftp/bootstrap.py", line 200, in cancel
            self.transport.stopListening()
        exceptions.AttributeError: 'NoneType' object has no attribute 'stopListening'

2014-11-13 15:53:29-0500 [-] Logged OOPS id OOPS-842a971397c89925dec64bda02d5fb03: AttributeError: 'NoneType' object has no attribute 'stopListening'