* @param in the request being made.
* @param rh the RequestHandler for this request
*/
public HttpHeader is304 (HttpHeader in, Connection con,
Connection.RequestHandler rh) {
CacheEntry entry = rh.entry;
if (entry == null)
return null;
HttpHeader oldresp = rh.dataHook;
/* if we should have gotten anything but a 2xx or a 304,