K 10
svn:author
V 6
yuripv
K 8
svn:date
V 27
2019-09-10T15:09:46.104384Z
K 7
svn:log
V 357
locale: handle day, abday, mon, abmon, am_pm keywords

All of these are defined as mandatory by POSIX.

While here, mark all non-standard ones as FreeBSD-only as
other systems (at least, GNU/Linux and illumos) do not handle
them, so we should not encourage their use.

PR:		237752
Reviewed by:	bapt
Differential Revision:	https://reviews.freebsd.org/D21490

END