Catch socket errors when doing SSL handshake

                logger.exception('SSL error:')

                self._goto(self.handle_error)

                return

        except socket.error as exc:

            logger.error('Socket error while doing handshake, (errno %s: %s)',

                         exc.errno, exc.strerror)

            self._goto(self.handle_error)

            return

        else:

            # create rpc_connection object

            self.rpc_con = RpcConnection(