Redirect Fallback

When you use `res.redirect()` the browser is automatically redirected to the new page. But in cases where there previously was a `res.write()` call, the redirect fails and you see [this message](https://github.com/visionmedia/express/blob/master/lib/response.js#L713) instead:

```javascript
'<p>' + statusCodes[status] + '. Redirecting to <a href="' + u + '">' + u + '</a></p>';
```

Would it be better to prepend to that something along the lines of the below so the redirect still works?:

```javascript
'<script>window.location="'+url+'"</script>'
```