Make the "All Estates" option work from the client (this makes chosen changes to all the estates that the user owns).

This applies to adding/removing estate users, groups, managers and bans.
This is the application of the AllEstates_0.5.patch from http://opensimulator.org/mantis/view.php?id=5420
Thanks very much, Snoopy!

OpenSim/Region/Framework/Interfaces/IEstateDataService.cs

@@ -70,6 +70,12 @@ namespace OpenSim.Region.Framework.Interfaces
         /// <returns></returns>        
         List<int> GetEstates(string search);
         
+        /// <summary>
+        /// Get the IDs of all estates owned by the given user.
+        /// </summary>
+        /// <returns>An empty list if no estates were found.</returns>
+        List<int> GetEstatesByOwner(UUID ownerID);        
+        
         /// <summary>
         /// Get the IDs of all estates.
         /// </summary>