Mantis#1965. Thank you kindly, HomerHorwitz for a patch that:

Places touched:
- Added two events for in-packets to LLCLientView: RegionHandleRequest and
  ParcelInfoRequest
- Added sending of two out-packets to LLCLientView: RegionIDAndHandleReply and
  ParcelInfoReply.
- Scene handles the RegionHandleRequest, LandManagementModule the
  ParcelInfoRequest
- Added inter-region request for LandData by RegionHandle and local position.
  This was implemented as XML-RPC request. The returned LandData isn't
  complete, it only contains the data necessary for answering the
  ParcelInfoRequest
- Added new CAPS (0009) for RemoteParcelRequest and some methods for LandData
  handling to LandManagementModule
- Added methods for fake parcelID creation and parsing to Util
- Fixed missing implementation of interface methods.
- Added new file:
    OpenSim/Framework/Communications/Capabilities/LLSDRemoteParcelResponse.cs
  NOTE: This is part of the patch, too.
Due to the many places touched, I would consider this patch as experimental.

OpenSim/Framework/IClientAPI.cs

@@ -293,6 +293,9 @@ namespace OpenSim.Framework
     public delegate void EstateBlueBoxMessageRequest(IClientAPI remoteClient, LLUUID invoice, LLUUID senderID, LLUUID sessionID, string senderName, string message);
     public delegate void EstateDebugRegionRequest(IClientAPI remoteClient, LLUUID invoice, LLUUID senderID, bool scripted, bool collisionEvents, bool physics);
     public delegate void EstateTeleportOneUserHomeRequest(IClientAPI remoteClient, LLUUID invoice, LLUUID senderID, LLUUID prey);
+    public delegate void RegionHandleRequest(IClientAPI remoteClient, LLUUID regionID);
+    public delegate void ParcelInfoRequest(IClientAPI remoteClient, LLUUID parcelID);
+    
     public delegate void ScriptReset(IClientAPI remoteClient, LLUUID objectID, LLUUID itemID);
     public delegate void GetScriptRunning(IClientAPI remoteClient, LLUUID objectID, LLUUID itemID);
     public delegate void SetScriptRunning(IClientAPI remoteClient, LLUUID objectID, LLUUID itemID, bool running);
@@ -498,6 +501,9 @@ namespace OpenSim.Framework
         event EstateDebugRegionRequest OnEstateDebugRegionRequest;
         event EstateTeleportOneUserHomeRequest OnEstateTeleportOneUserHomeRequest;
         event UUIDNameRequest OnUUIDGroupNameRequest;
+        
+        event RegionHandleRequest OnRegionHandleRequest;
+        event ParcelInfoRequest OnParcelInfoRequest;
 
         event RequestObjectPropertiesFamily OnObjectGroupRequest;
         event ScriptReset OnScriptReset;
@@ -721,5 +727,8 @@ namespace OpenSim.Framework
         
         void SendSetFollowCamProperties(LLUUID objectID, SortedDictionary<int, float> parameters);
         void SendClearFollowCamProperties(LLUUID objectID);
+        
+        void SendRegionHandle(LLUUID regoinID, ulong handle);
+        void SendParcelInfo(RegionInfo info, LandData land, LLUUID parcelID, uint x, uint y);
     }
 }