bug#23033: 24.5; Lock file uses the same extension as the file it's locking

[Eli Zaretskii]

> From: Michael Sloan <mgsloan@gmail.com>
> Date: Thu, 7 Nov 2019 23:17:16 -0700
> Cc: 23033@debbugs.gnu.org
> 
> Correct, it is easy to fix in the tens of thousands of places where it can 
> cause misbehavior :)  But it is probably
> easier to fix it one place.

Easier for whom?

These tools all have bugs: they choke on symlinks that point to
non-existent targets.  There could be symlinks like that which have
nothing to do with Emacs's lock files.  So from my POV we did those
tools a favor by exposing their bugs ;-)  I see no reason to sweep
the bugs of those packages under the carpet so as to make it easier
for their developers to keep those bugs.