bug#41572: 28.0.50; [PATCH] Support plain project marked with file .emacs-project

[Juri Linkov]

>>>> A way to specify ignore entries for "fallback" projects can be added easily
>>>> with a variable like project-fallback-ignores (same as
>>>> project-vc-ignores). I've been debating internally whether we need such
>>>> a variable at all, and whether it should simply be an alias for
>>>> project-vc-ignores. But, uh, probably not?
>>> Adding such a line to .dir-locals.el would be fine:
>>>    ((nil . ((project-vc-ignores . '("subdir1/" "subdir2/")))))
>>
>>     ((nil . ((project-fallback-ignores . '("subdir1/" "subdir2/")))))
>
> This is fine too.

Actually, the name 'project-fallback-ignores' would be too weird
when used in .dir-locals.el.  The users will ask "Fall back from where?"

Maybe a better name would be 'project-directory-ignores'
with the directory-based backend name 'project-directory'?