[DGD] DGD MP and a TLS idea

[Steve Wooster]

>The point of having TLS is that it's shared between all objects.  If each
>object has its own TLS variables, they might as well be in the object. :)
>
>Regards,
>Dworkin

I figured it might be useful for cases where you want data stored 
per-object, but don't want two threads with the same object to conflict. 
...maybe I don't know enough about what will or won't cause two threads to 
conflict with each other.

-Steve Wooster