Fixes some of U4-2633 Bundle all cache refresher transmissions into a single call per request for much better performance. See last note on issue.

src/Umbraco.Core/Sync/IServerAddress.cs

@@ -8,5 +8,7 @@ namespace Umbraco.Core.Sync
     internal interface IServerAddress
     {
         string ServerAddress { get; }
+
+        //TODO : Should probably add things like port, protocol, server name, app id
     }
 }