bug#19968: 25.0.50; fails to open any file not in version control

[Eli Zaretskii]

> From: James Cloos <cloos@jhcloos.com>
> Cc: 19968@debbugs.gnu.org
> Date: Sat, 28 Feb 2015 09:47:41 -0500
> 
> > With "emacs -Q"?  Doesn't happen here with the current master.
> 
> I grep(1)ed throughout for references to arch; nothing showed up.
> 
> But with the hint I actually read through my (custom-set-variables) file
> and found Arch in vc-handled-backends....
> 
> [SIGH]
> 
> Evidently I had customized it at some point in the distant past, but I
> have no idea why.
> 
> Anyone else who ever did, and left Arch in the list, will get hit by
> this, too.

Apart of telling people in NEWS about this change, is there anything
else we could do?