Grid Inventory feature upgrade: renaming folders should now be correct, subfolders work, moving folders works.

Tested only in MYSQL, but may work in MSSQL and sqlite.
Probably not working in standalone mode.

OpenSim/Framework/InventoryItemBase.cs

@@ -238,6 +238,12 @@ namespace OpenSim.Framework
         /// <param name="folder">The inventory folder</param>
         void updateInventoryFolder(InventoryFolderBase folder);
 
+        /// <summary>
+        /// Updates a folder based on its ID with folder
+        /// </summary>
+        /// <param name="folder">The inventory folder</param>
+        void moveInventoryFolder(InventoryFolderBase folder);
+
         /// <summary>
         /// Deletes a folder based on its ID with folder
         /// </summary>