[Interest] Changing permissions in a dir

[Guido Seifert]

> 
> Don't use QDir. Use QDirIterator.
> 
> Not only is it more efficient, it also has an option to recurse.

Aaarrgghh.... since ancient times I used QDir. And now you tell
about QDirIterator. A check... available since Qt 4.3. I totally
overlooked this one. 

But it seems I am not the only one. :-)

Guido