docs: function reqToJSON (req, additional) {
    additional = additional || []
    if (additional === true) {
      additional = [
        'rawHeaders',
        'rawTrailers',
        // express/koa
        'fresh',
        'cookies',
        'ip',
        'ips',
        'stale',
        'subdomains'
      ]
    }
    var keys = [
      'body',
      'headers',
      'httpVersion',
      'method',
      'trailers',
      'url',
      'socket.remoteAddress',
      // express/koa
      'originalUrl',
      'params',
      'query'
  
    ].concat(additional).sort()
    var json = pick(req, keys)
    defaults(json, getParsedUrl(req))
    return json
  }