Comment 0 for bug 1342302

After upgrade, pserv dies with the following:

2014-07-15 14:26:53-0400 [-] TFTP Listener started at 10.14.4.1:69
2014-07-15 14:26:53-0400 [-] TFTP Listener started at 10.14.4.1:69
2014-07-15 14:26:53-0400 [-] Unhandled Error
 Traceback (most recent call last):
   File "/usr/lib/python2.7/dist-packages/twisted/application/service.py", line 282, in startService
     service.startService()
   File "/usr/lib/python2.7/dist-packages/twisted/application/internet.py", line 273, in startService
     self._loopFinished = self._loop.start(self.step, now=True)
   File "/usr/lib/python2.7/dist-packages/twisted/internet/task.py", line 173, in start
     self()
   File "/usr/lib/python2.7/dist-packages/twisted/internet/task.py", line 218, in __call__
     d = defer.maybeDeferred(self.f, *self.a, **self.kw)
 --- <exception caught here> ---
   File "/usr/lib/python2.7/dist-packages/twisted/internet/defer.py", line 139, in maybeDeferred
     result = f(*args, **kw)
   File "/usr/lib/python2.7/dist-packages/provisioningserver/tftp.py", line 297, in updateServers
     tftp_service.setServiceParent(self)
   File "/usr/lib/python2.7/dist-packages/twisted/application/service.py", line 186, in setServiceParent
     self.parent.addService(self)
   File "/usr/lib/python2.7/dist-packages/twisted/application/service.py", line 308, in addService
     service.privilegedStartService()
   File "/usr/lib/python2.7/dist-packages/twisted/application/internet.py", line 105, in privilegedStartService
     self._port = self._getPort()
   File "/usr/lib/python2.7/dist-packages/provisioningserver/tftp.py", line 221, in _getPort
     return self._listenUDP(*self.args, **self.kwargs)
   File "/usr/lib/python2.7/dist-packages/provisioningserver/tftp.py", line 227, in _listenUDP
     p.startListening()
   File "/usr/lib/python2.7/dist-packages/twisted/internet/udp.py", line 171, in startListening
     self._bindSocket()
   File "/usr/lib/python2.7/dist-packages/twisted/internet/udp.py", line 191, in _bindSocket
     raise error.CannotListenError(self.interface, self.port, le)
 twisted.internet.error.CannotListenError: Couldn't listen on ::1:69: [Errno 2] No such file or directory.

2014-07-15 14:26:53-0400 [-] Warning: No permission to delete pid file
2014-07-15 14:26:53-0400 [-] Warning: No permission to delete pid file