docs: def __wait_for_one_server_connection(self):
          """Wait until at least one server is connected. Since quitting relies 
          on a bunch of loops terminating, attempting to quit [cleanly] 
          immediately will still have to wait for the connections to finish 
          starting.
          """
  
          _logger.info("Waiting for first connection.")
  
          while 1:
              is_connected_to_one = False
              for (n, c, g) in self.__connections:
                  if c.is_connected is True:
                      is_connected_to_one = True
                      break
                  elif g.exception == nsq.exceptions.NsqConnectGiveUpError:
                      raise IOError("One of the servers could not be connected "
                                    "during startup: [%s]" % (c))
                  elif g.exception is not None:
                      raise IOError("One of the connection gthreads had an "
                                    "uncaught exception during startup: [%s] "
                                    "[%s]" % 
                                    (g.exception.__class__.__name__, 
                                     str(g.exception)))
                  elif g.dead is True:
                      raise SystemError("One of the connection gthreads died "
                                        "during startup: [%s]" % (c,))
  
              if is_connected_to_one is True:
                  break
  
              gevent.sleep(nsq.config.client.CONNECT_AUDIT_WAIT_INTERVAL_S)