ld-auto-import documentation update

[Charles Wilson]

Charles Wilson wrote:
> Ralf --
>   comments and suggested changes interposed throughout.  You're right, 
> the documentation of this subject could stand to be improved from what 
> exists now, and your changes make a good start in that direction.

Crud.  I didn't notice that Nick had already committed your changes. 
I'll rework my suggestions into a patch against current CVS...

--Chuck