[jdom-interest] detach() [eg]

[Jools]

> What if we made the name of that element more obvious that it was the result
> of a developer error, as that's what it is. Something like
> <missing-root-element/>
> 
> or something. That would go a long way towards making me feel more
> comfortable here. Anyone else?

I like that idea. It keeps the document valid whilst making it pretty
obvious that something is missing.

+1

--Jools