code: function cleanStream() {
  	var logStream = this.logstream;
  	this.logstream = this.cleanStream = null;
  
  	this.log = null;
  	this.logname = null;
  	this._logname = null;
  
  	// wait a little bit to let other end events process before closing the stream
  	logStream && setTimeout(logStream.end.bind(logStream), 500);
  }
docs: Cleans a req log stream up after a delayed period. This should be used as a method of a req, and called within the
  context of a req only (ie. req.cleanStream = cleanStream; req.cleanStream()).