Servlets: Close output stream on redirect,

instead of flushing buffer, to force commitment

apps/routerconsole/java/src/net/i2p/router/web/HostCheckHandler.java

@@ -183,6 +183,6 @@ public class HostCheckHandler extends GzipHandler
         // https://w3c.github.io/webappsec-upgrade-insecure-requests/
         httpResponse.setHeader("Vary", "Upgrade-Insecure-Requests");
         httpResponse.setStatus(307);
-        httpResponse.flushBuffer();
+        httpResponse.getOutputStream().close();
     }
 }

apps/routerconsole/java/src/net/i2p/router/web/helpers/CodedIconRendererServlet.java

@@ -65,7 +65,7 @@ public class CodedIconRendererServlet extends HttpServlet {
                  }
              } else {
                  srs.setStatus(304);
-                 srs.flushBuffer();
+                 srs.getOutputStream().close();
              }
          } else {
              //Binary data is not present but must be substituted by file on disk