Why I attempted to port dired/VC from emacs

[Rodney Sparapani]

Rodney Sparapani wrote:
> Rodney Sparapani wrote:
 >
>> And note that vc-dired-terse-mode is actually being set to nil on
>> line 2458 of vc.el.  But, for me, that's too late.  Hence the need
>> for my earlier change above.
>>
>> Rodney

I don't understand this.  The variable vc-dired-terse-mode is wreaking
havoc again.  This variable should be defined in vc-hooks.el I guess.
Technically, this variable should be buffer-local everywhere, but all
we do is set it to nil anyways.  Let's set it once and avoid all the
potential void-variable errors.  It seems there are similar settings
for other unused/unimplemented variables/features in vc-hooks already.