bug#56641: Deprecate `lsh`

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: 56641@debbugs.gnu.org,  Wilson Snyder <wsnyder@wsnyder.org>, "'Eli
>  Zaretskii'" <eliz@gnu.org>
> Date: Sat, 23 Jul 2022 13:20:22 +0200
> 
> Mattias Engdegård <mattiase@acm.org> writes:
> 
> > There is now a compiler warning about calls to `lsh`.
> 
> Eli didn't agree with that, I think?  I was just expressing an opinion,
> and not, er, like saying "go forth and deprecate".  :-/  Sorry for being
> unclear.
> 
> Let's see what Eli says...

No, I just said the warning shouldn't be about obsoletion.  What's in
the code is fine by me, it just says to use 'ash' instead.