K 10
svn:author
V 6
yuripv
K 8
svn:date
V 27
2019-09-11T15:39:28.494734Z
K 7
svn:log
V 494
locale: more output fixes

- make abday, day, abmon, mon, am_pm output quoting match linux
- workaround localeconv() issue for mon_grouping and grouping (PR172215)
- for other values not available in default locale, output -1 instead of
  127 (CHAR_MAX) as returned by localeconv()

With these changes, output of `locale` and `locale -k` for all keywords
specified by POSIX exactly matches the linux one.

PR:		237752
Reviewed by:	bapt
Differential Revision:	https://reviews.freebsd.org/D21599

END