public void sendReply_404(MyHTTPServer socket, String url) throws Exception
	{
		List<String> reply = new ArrayList<String>();

		reply.add("HTTP/1.0 404 Url not known\r\n");
		reply.add("Connection: close\r\n");
		reply.add("Content-Type: text/html\r\n");
		reply.add("\r\n");
		addPageHeader(reply, "");
		reply.add("URL \"" + url + "\" not known!");
		addPageTail(reply, true);

		socket.sendReply(reply);
	}