gdatetime: Document that specific AM/PM formatting is discouraged
Many locales have no concept of AM/PM notation, and it’s confusing to them. It’s an Anglo-centric concept which doesn’t belong in the API at this level — instead, programs should use more generic format specifiers which leave the details of how to format a date/time to the locale.
Signed-off-by: Philip Withnall withnall@endlessm.com
Fixes: #2082 (closed)