strspn
======

POSIX specification:
 http://www.opengroup.org/onlinepubs/9699919799/functions/strspn.html

Gnulib module: ---

Portability problems fixed by Gnulib:

Portability problems not fixed by Gnulib:

  * This function cannot work correctly on character strings in multibyte locales. Gnulib provides an alternative function mbsspn that works on character strings in all locales.