bug#40919: 27.0.91; next-error-select-buffer does not always behave as documented

[Eli Zaretskii]

> From: Juri Linkov <juri@linkov.net>
> Date: Sun, 03 May 2020 02:38:10 +0300
> Cc: 40919@debbugs.gnu.org
> 
> It seems there is no right answer suitable for all users.  So I propose
> to add more options.
> 
> Eli, do you agree with adding more options to 
> `next-error-find-buffer-function'
> in emacs-27?
> 
> Currently it has one option that defines one of possible behaviors existed
> in older versions.  Now we need to add other option for compatibility
> with pre-27 versions.
> 
> Then users of emacs-27 could decide whether they want to keep
> the old behavior or use the new.

I think the time for adding new options to Emacs 27 has come and gone
long ago.  We should defer that to future releases.