Add lsClearWindlightScene() to the lightshare module to remove WL settings

from a region and allow normal day cycles to be reestablished

OpenSim/Region/Framework/Interfaces/ISimulationDataService.cs

@@ -94,5 +94,6 @@ namespace OpenSim.Region.Framework.Interfaces
         RegionSettings LoadRegionSettings(UUID regionUUID);
         RegionLightShareData LoadRegionWindlightSettings(UUID regionUUID);
         void StoreRegionWindlightSettings(RegionLightShareData wl);
+        void RemoveRegionWindlightSettings(UUID regionID);
     }
 }