Add pg_iswcased().
True if character has multiple case forms. Will be a useful
multibyte-aware replacement for char_is_cased().
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Discussion: https://postgr.es/m/
450ceb6260cad30d7afdf155d991a9caafee7c0d.camel@j-davis.com