Changed health check to send user to appropriate scenario on Wiki. Also added support to Nzbget to get the Category config.

src/NzbDrone.Core/Download/IDownloadClient.cs

@@ -14,5 +14,7 @@ namespace NzbDrone.Core.Download
         void RemoveItem(string id);
         void RetryDownload(string id);
         void Test();
+
+        DownloadClientStatus GetStatus();
     }
 }