mbsinit
=======

POSIX specification:
 https://pubs.opengroup.org/onlinepubs/9699919799/functions/mbsinit.html

Gnulib module: mbsinit

Portability problems fixed by Gnulib:

  * This function is missing on some platforms: Minix 3.1.8, HP-UX 11.00, IRIX 6.5, MSVC 14.

  * This function always returns 1, even in multibyte locales, on some platforms: mingw.

Portability problems not fixed by Gnulib:

  * This function is not useful after calls to mbrtoc16 or mbrtoc8.