Waits for data forever and feeds the input queue.

def _recv_loop(self):
        """
        Waits for data forever and feeds the input queue.
        """
        while True:
            try:
                data = self._socket.recv(4096)
                self._ibuffer += data
                while '\r\n' in self._ibuffer:
                    line, self._ibuffer = self._ibuffer.split('\r\n', 1)
                    self.iqueue.put(line)
            except Exception:
                break