bug#1806: dired-pop-to-buffer in wrong place

[Stefan Monnier]

> `dired-pop-to-buffer' could bind `split-window-preferred-function' to a
> function that tries to always split the selected window instead of
> whatever window was chosen by `display-buffer' but that would override
> any user customizations of `split-window-preferred-function'.

Why would it override it?  It would of course bind
split-window-preferred-function to a function that selects the right
window and then calls the previous value.


        Stefan