move deep effective permissions aggregation to first time use and not on changes. There flag it is need with InvalidateDeepEffectivePerms(). Add config options PropagateGroupShareOutwards and PropagateAnyOneOutwards

OpenSim/Region/Framework/Scenes/SceneObjectPartInventory.cs

@@ -979,7 +979,7 @@ namespace OpenSim.Region.Framework.Scenes
                 }
 // old code end
                 rootPart.TrimPermissions();
-                group.AggregateDeepPerms();
+                group.InvalidateDeepEffectivePerms();
             }
 
             return true;