title: What state does self.finish() put the tornado web server in?
body: <p>What state does self.finish() put the <code>torando</code> web server in? I assume it closes the current connection. Currently I'm using <code>self.set_status(204)</code> to return a HTTP response code but I am not calling <code>self.finish()</code>, should I be calling it at the end of every request handler?</p>