Forward to jenkins.io instead of wiki directly

core/src/main/java/hudson/diagnosis/ReverseProxySetupMonitor.java

@@ -92,7 +92,7 @@ public class ReverseProxySetupMonitor extends AdministrativeMonitor {
             // of course the irony is that this redirect won't work
             return HttpResponses.redirectViaContextPath("/manage");
         } else {
-            return new HttpRedirect("https://wiki.jenkins-ci.org/display/JENKINS/Jenkins+says+my+reverse+proxy+setup+is+broken");
+            return new HttpRedirect("https://jenkins.io/redirect/troubleshooting/broken-reverse-proxy");
         }
     }