docs: def shutdown(self, exitcode=0, exitmsg=None):
          '''
          If sub-classed, run any shutdown operations on this method.
          '''
          log.info('The salt-api is shutting down..')
          msg = 'The salt-api is shutdown. '
          if exitmsg is not None:
              exitmsg = msg + exitmsg
          else:
              exitmsg = msg.strip()
          super(SaltAPI, self).shutdown(exitcode, exitmsg)