strndup
=======

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

Gnulib module: strndup

Portability problems fixed by Gnulib:

  * This function is missing on some platforms: Mac OS X 10.5, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, Minix 3.1.8, HP-UX 11, IRIX 6.5, Solaris 10, mingw, MSVC 14.

  * This function does not NUL-terminate the result on some platforms: AIX 5.1.

Portability problems not fixed by Gnulib: