Send a `sc_pb.RequestAction`, which may include multiple actions.

def actions(self, req_action):
    """Send a `sc_pb.RequestAction`, which may include multiple actions."""
    if FLAGS.sc2_log_actions:
      for action in req_action.actions:
        sys.stderr.write(str(action))
        sys.stderr.flush()

    return self._client.send(action=req_action)