f263ca4fea
This commit allows middleware to set the status code of the http response. This will allow a server-side router to return, for example, a '404 Not Found' response. This has SEO benefits because currently search engines may index example.org/page-that-doesn't-exist because Meteor returns a 200 OK code and the normal boilerplate response body. With a proper 404 status we can still return the boilerplate to render a client side 404 template but search engines won't index the page. Instead of a hardcoded 200 response, we call res.writeHead with res.statusCode, and fallback to the default 200 code if it has not been set.
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