Comment on purpose of TRegistryStorage::Copy

Source commit: c764acaf0dca2aa14738ba2702f078959372c753

source/core/HierarchicalStorage.cpp

@@ -422,6 +422,7 @@ __fastcall TRegistryStorage::~TRegistryStorage()
   delete FRegistry;
 };
 //---------------------------------------------------------------------------
+// Used only in OpenSessionInPutty
 bool __fastcall TRegistryStorage::Copy(TRegistryStorage * Storage)
 {
   TRegistry * Registry = Storage->FRegistry;