lib/59139: POSIX.1-2024: dcgettext_l, dgettext_l, gettext_l, ngettext_l; getlocalename_l

[campbell+netbsd%mumble.net@localhost]

>Number:         59139
>Category:       lib
>Synopsis:       POSIX.1-2024: dcgettext_l, dgettext_l, gettext_l, ngettext_l; getlocalename_l
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    lib-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Mar 06 13:35:00 +0000 2025
>Originator:     Taylor R Campbell
>Release:        current, 10, 9, ...
>Organization:
The NetBSD.1-2024 Foundation_l
>Environment:
>Description:
POSIX.1-2024 adds the following locale-parametrized gettext-related functions:

https://pubs.opengroup.org/onlinepubs/9799919799/functions/dcgettext_l.html

Also the following non-gettext-related locale-parametrized function which I figured I'd toss in here to avoid incrementing the gnats number too quickly:

https://pubs.opengroup.org/onlinepubs/9799919799/functions/getlocalename_l.html

These are missing in NetBSD.
>How-To-Repeat:
standards inspection

https://pubs.opengroup.org/onlinepubs/9799919799/xrat/V4_xsh_chap01.html
>Fix:
Yes, please!