[fpc-pascal] function to do common things to files a directory (possibly recursive)

[Bart]

>  OOT: My project  http://code.google.com/p/express-gui ExPress  uses a unit
>  called browserdetection. But I don't see any author name in the comment,
>  please check if it yours. I'll add your name in the next version.

I can not find any sourcecode on
http://code.google.com/p/express-gui/source/browse/ at all.
You can check my BrowserDetect unit, to see if it is the same.
OTOH I based my code on code snippets from several others, so no need
to mention my name specifically ;-)

Bart