code: function faviconRequestHandler( req, res, next ) {
    var icon = ''
  
    if ( typeof req.url !== 'string' ) {
      return next()
    }
  
    if ( url.parse( req.url ).pathname !== '/favicon.ico' ) {
      return next()
    }
  
    res.setHeader( 'content-length', icon.length )
    res.setHeader( 'content-type', 'image/x-icon' )
    res.send( icon )
  }
docs: @param {IncomingMessage} req
  @param {string} [req.url]
  
  @param {ServerResponse} res
  @param {Function} res.send
  @param {Function} res.setHeader
  
  @param {Function} next
  
  @returns {*}