bug#62677: 30.0.50; Need to find a better name for flyspell-prog-mode

[Eli Zaretskii]

> From: Stefan Kangas <stefankangas@gmail.com>
> Date: Wed, 6 Sep 2023 11:51:14 -0700
> Cc: jporterbugs@gmail.com, michael_heerdegen@web.de, 62677@debbugs.gnu.org
> 
> Here's the plan I'd propose: Add a new defvar-local
> `flyspell-use-prog-mode' or somesuch that major modes can set.  Now,
> when a user enables `flymake-mode' in a buffer where that variable is
> non-nil, the extra stuff done in `flyspell-prog-mode' gets done too.
> Then decide which built-in major modes that would benefit, and set that
> variable in them.

SGTM.

> Would `prog-mode' be a candidate though, or do we expect any modes
> inheriting from it to want the regular `flyspell-mode'?

The former, I guess?