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

[Juri Linkov]

>>>     ((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'?

Or simply 'project-dir-ignores' where 'dir' refers to 'dir-locals'.