[tex-k] kpsewhich not searching disk despite !! not being specified

[Yann Salmon]

> You are right that this is not what the manual says. I believe it's a
> bug that crept in at some point (many years ago), which sadly I have
> never tried to track down. Maybe someday. Or maybe someone else will be
> interested enough to do so. Meanwhile, I'll see if I can update the
> manual in some way.

In that case it would be useful to add to section 8.5.1 ("… and is not
listed in ls-R") a mention of the fact that ls-R is not always used, in
particular, by default, in $TEXMFHOME.

Section 8.5.2 should also be updated because it exactly states that
"Kpathsea always uses ls-R if it’s present".