docs: def config(name, reset=False, **kwargs):
      '''
      Modify configuration options for a given port. Multiple options can be
      specified. To see the available options for a port, use
      :mod:`ports.showconfig <salt.modules.freebsdports.showconfig>`.
  
      name
          The port name, in ``category/name`` format
  
      reset : False
          If ``True``, runs a ``make rmconfig`` for the port, clearing its
          configuration before setting the desired options
  
      CLI Examples:
  
      .. code-block:: bash
  
          salt '*' ports.config security/nmap IPV6=off
      '''
      portpath = _check_portname(name)
  
      if reset:
          rmconfig(name)
  
      configuration = showconfig(name, dict_return=True)
  
      if not configuration:
          raise CommandExecutionError(
              'Unable to get port configuration for \'{0}\''.format(name)
          )
  
      # Get top-level key for later reference
      pkg = next(iter(configuration))
      conf_ptr = configuration[pkg]
  
      opts = dict(
          (six.text_type(x), _normalize(kwargs[x]))
          for x in kwargs
          if not x.startswith('_')
      )
  
      bad_opts = [x for x in opts if x not in conf_ptr]
      if bad_opts:
          raise SaltInvocationError(
              'The following opts are not valid for port {0}: {1}'
              .format(name, ', '.join(bad_opts))
          )
  
      bad_vals = [
          '{0}={1}'.format(x, y) for x, y in six.iteritems(opts)
          if y not in ('on', 'off')
      ]
      if bad_vals:
          raise SaltInvocationError(
              'The following key/value pairs are invalid: {0}'
              .format(', '.join(bad_vals))
          )
  
      conf_ptr.update(opts)
      _write_options(name, configuration)
  
      new_config = showconfig(name, dict_return=True)
      try:
          new_config = new_config[next(iter(new_config))]
      except (StopIteration, TypeError):
          return False
  
      return all(conf_ptr[x] == new_config.get(x) for x in conf_ptr)