Servlets: Close output stream on redirect,

instead of flushing buffer, to force commitment

apps/susimail/src/src/i2p/susi/webmail/WebMail.java

@@ -2297,7 +2297,7 @@ public class WebMail extends HttpServlet
 			buf.append(q.replace("&", "&"));  // no you don't html escape the redirect header
 		resp.setHeader("Location", buf.toString());
 		resp.setStatus(303);
-		resp.flushBuffer();
+		resp.getOutputStream().close();
 		Debug.debug(Debug.DEBUG, "P-R-G to " + q);
 	}