Console: Change sendError() to setStatus() for 3xx responses

to avoid unnecessary output

apps/i2psnark/java/src/org/klomp/snark/web/I2PSnarkServlet.java

@@ -1368,7 +1368,8 @@ public class I2PSnarkServlet extends BasicServlet {
         if (p.length() > 0)
             buf.append(p.replace("&", "&"));  // no you don't html escape the redirect header
         resp.setHeader("Location", buf.toString());
-        resp.sendError(303, "Received");
+        resp.setStatus(303);
+        resp.flushBuffer();
     }
 
     /** @since 0.9 */

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

@@ -63,7 +63,8 @@ public class CodedIconRendererServlet extends HttpServlet {
                      I2PAppContext.getGlobalContext().logManager().getLog(getClass()).warn("Error writing binary image data for plugin", e);
                  }
              } else {
-                 srs.sendError(304, "Not Modified");
+                 srs.setStatus(304);
+                 srs.flushBuffer();
              }
          } else {
              //Binary data is not present but must be substituted by file on disk

apps/routerconsole/jsp/flags.jsp

@@ -31,7 +31,7 @@ if (c != null &&
         long iflast = request.getDateHeader("If-Modified-Since");
         // iflast is -1 if not present; round down file time
         if (iflast >= ((lastmod / 1000) * 1000)) {
-            response.sendError(304, "Not Modified");
+            response.setStatus(304);
             return;
         }
         response.setDateHeader("Last-Modified", lastmod);

apps/routerconsole/jsp/viewtheme.jsp

@@ -52,7 +52,7 @@ if (lastmod > 0) {
     long iflast = request.getDateHeader("If-Modified-Since");
     // iflast is -1 if not present; round down file time
     if (iflast >= ((lastmod / 1000) * 1000)) {
-        response.sendError(304, "Not Modified");
+        response.setStatus(304);
         return;
     }
     response.setDateHeader("Last-Modified", lastmod);

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

@@ -2287,7 +2287,8 @@ public class WebMail extends HttpServlet
 		if (q != null && q.length() > 0)
 			buf.append(q.replace("&", "&"));  // no you don't html escape the redirect header
 		resp.setHeader("Location", buf.toString());
-		resp.sendError(303, "Received");
+		resp.setStatus(303);
+		resp.flushBuffer();
 		Debug.debug(Debug.DEBUG, "P-R-G to " + q);
 	}