Fully transitive const is not necessary

[Walter Bright]

Craig Black wrote:
> Walter/Andrei are under the impression that transitive const is 
> necessary for multiprogramming, but they have not presented a detailed 
> explanation about why it is necessary.  It sounds like a more detailed 
> explanation of the merits of transitive const from Walter/Andrei would 
> help here.

That'll all come when we get the details worked out on how D will 
support multiprogramming. It's an ongoing effort, and current events are 
leading us to believe that this is getting extremely important.