Bring back configurability in expert mode

[Alan Cox]

> > problems.  I spent most of a week tracking down something that only
> > happened in expert mode once just because expert mode used to make
> > bizarre assumptions about things that didn't make sense or get tested.
> > 
> Then what sound there be?  Expert-Expert mode?

Or put the expert on the boot options not the config tool so that you
have to be an expert to use it 8)