xfdesktop: where is the "system menu" coming from?

[Brian J. Tarricone]

Nils Rennebarth wrote:

> Hi,
>
> I tried to find it from reading the source but gave up after a while, 
> so here my question: where does the "system menu" come from (I'm 
> talking about the current CVS version) I do have one, but have no 
> idea, where it
> comes from.
>
> Could someone shed a little light on this matter?

xfce4/xfdesktop/modules/menu/