Neil Booth c918e74039 Put common network start and stop code in one place. ...

Prefer to use safer self.is_connected() as it checks interface
is not None.

Using common code gives small observable changes in behaviour:

 - slightly different print_error() messages
 - network restarts now enter status 'connecting' which they
   didn't before, which seems correct
 - status 'connecting' is done with set_status() rather than
   simply assigning the status, which seems more correct.  Now
   that the response_queue is available in the constructor this
   works; it used to fail with 'response_queue is not defined'

2015-05-22 07:52:59 +09:00

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