Fix OAR parcel loading so that old parcels are replaced by the new instead of merged.

The --merge switch will still merge the old and new land parcelling.

OpenSim/Region/CoreModules/World/Archiver/ArchiveReadRequest.cs

@@ -230,6 +230,10 @@ namespace OpenSim.Region.CoreModules.World.Archiver
                     parcel.OwnerID = m_scene.RegionInfo.EstateSettings.EstateOwner;
                 landData.Add(parcel);
             }
+            
+            if (!m_merge)                
+                m_scene.LandChannel.Clear();
+            
             m_scene.EventManager.TriggerIncomingLandDataFromStorage(landData);
             m_log.InfoFormat("[ARCHIVER]: Restored {0} parcels.", landData.Count);
 

OpenSim/Region/CoreModules/World/Land/LandChannel.cs

@@ -116,6 +116,12 @@ namespace OpenSim.Region.CoreModules.World.Land
 
             return new List<ILandObject>();
         }
+        
+        public void Clear()
+        {
+            if (m_landManagementModule != null)
+                m_landManagementModule.Clear();
+        }
 
         public List<ILandObject> ParcelsNearPoint(Vector3 position)
         {

OpenSim/Region/CoreModules/World/Land/LandManagementModule.cs

@@ -636,6 +636,25 @@ namespace OpenSim.Region.CoreModules.World.Land
                 m_landList.Remove(local_id);
             }
         }
+        
+        /// <summary>
+        /// Clear the scene of all parcels
+        /// </summary>        
+        public void Clear()
+        {
+            lock (m_landList)
+            {
+                foreach (ILandObject lo in m_landList.Values)
+                {
+                    //m_scene.SimulationDataService.RemoveLandObject(lo.LandData.GlobalID);
+                    m_scene.EventManager.TriggerLandObjectRemoved(lo.LandData.GlobalID);
+                }
+                
+                m_landList.Clear();
+            }
+            
+            ResetSimLandObjects();
+        }
 
         private void performFinalLandJoin(ILandObject master, ILandObject slave)
         {

OpenSim/Region/Framework/Interfaces/ILandChannel.cs

@@ -69,6 +69,11 @@ namespace OpenSim.Region.Framework.Interfaces
         /// <returns></returns>
         ILandObject GetLandObject(int localID);
         
+        /// <summary>
+        /// Clear the land channel of all parcels.
+        /// </summary>
+        void Clear();
+        
         bool IsLandPrimCountTainted();
         bool IsForcefulBansAllowed();
         void UpdateLandObject(int localID, LandData data);

OpenSim/Region/RegionCombinerModule/RegionCombinerLargeLandChannel.cs

@@ -62,6 +62,11 @@ public class RegionCombinerLargeLandChannel : ILandChannel
         {
             return RootRegionLandChannel.AllParcels();
         }
+        
+        public void Clear()
+        {
+            RootRegionLandChannel.Clear();
+        }
 
         public ILandObject GetLandObject(int x, int y)
         {

OpenSim/Tests/Common/Mock/TestLandChannel.cs

@@ -55,6 +55,11 @@ namespace OpenSim.Tests.Common.Mock
         {
             return new List<ILandObject>();
         }
+        
+        public void Clear()
+        {
+            // Intentionally blank since we don't save any parcel data in the test channel
+        }
 
         protected ILandObject GetNoLand()
         {