bug#58447: [PATCH] In project-find-file, add absolute file name to history

[Augusto Stoffel]

>>> Unfortunately, this makes the emacs-29 release unusable.
>>
>> Would you say the new behavior is worse than what we had before?
>
> Unfortunately, yes.  It turned out that it interferes too much
> in normal workflows of using 'C-x p f'.  I suggest to keep
> the history of 'C-x p f' with relative filenames intact,
> and add absolute filenames to 'file-name-history' that already
> contains absolute filenames.

Until now, `C-x p f' and `C-x C-f' have always shared the same history
variable, `file-name-history'.  Reverting this change to go back to the
even more broken (IMO) behavior of adding relative file names to the
history of `C-x C-f' et al.

How about computing the history of `C-x p f' dynamically by filtering
the elements of `file-name-history' which belong to the current project?
This is simpler than the other viable solution, to introduce
project-dependent histories.