> >  Add support for multibyte charsets in the "tolower" and "toupper" =
awk
> >  functions.
> Thank you for this.

You're welcome.

> >  Code contributed by Aleksey Cheusov in PR#36394, and slightly
> >  tweaked for closer-to-KNF conventions by me.
>                ^^^^^^^^^^^^^
>                what's this?

KNF stands for Kernel Normal Form, but it's a shorthand for
NetBSD's coding conventions, ref. /usr/share/misc/style.  I
didn't follow it completely through, since this is third-party
code. Most touch-ups were just whitespace-related (e.g. no
whitespace after function name or casts).

> >  Also slightly improved checks of error returns.
> And especially for this ;-)
>
> Minor note. According to man page wcrtomb cannot return (size_t) -2.

You're absolutely correct.  However, one out of two isn't all bad
either, as "n" can never go negative. :-)  I'll remove the
superfluous test shortly.

Regards,

- H=E5vard