bug#19548: VC changes under-documented, needlessly incompatible

[Eli Zaretskii]

> From: Dmitry Gutov <dgutov@yandex.ru>
> Date: Mon, 16 May 2016 02:37:33 +0300
> Cc: "Eric S. Raymond" <esr@thyrsus.com>
> 
> On the other hand, vc-cvs-stay-local-p contains this bit of code:
> 
> (let* ((sym (vc-make-backend-sym 'CVS 'stay-local))
>         (stay-local (if (boundp sym) (symbol-value sym) vc-stay-local)))
> 
> which seems like it will ensure that if the user has customized both 
> vc-stay-local and vc-cvs-stay-local, the latter will win out (which 
> won't necessarily happen if we just declare the former to be an obsolete 
> alias of the latter).
> 
> So it seems we're actually buying some extra compatibility here at the 
> cost of some complexity. Do we care about the above detail?

I'm not sure I see the gain, given that (AFAIU) CVS is the only
back-end for which this option is relevant.