Implement a method to allow regions to query the gridwide Freeswitch

configuration from ROBUST

OpenSim/Services/Interfaces/IFreeswitchService.cs

@@ -35,5 +35,6 @@ namespace OpenSim.Services.Interfaces
     {
         Hashtable HandleDirectoryRequest(Hashtable requestBody);
         Hashtable HandleDialplanRequest(Hashtable requestBody);
+        string GetJsonConfig();
     }
 }