standards/63173: Patch to add getopt_long_only(3) to libc

[Garrett Wollman]

<<On Sun, 22 Feb 2004 08:20:11 -0800 (PST), Marius Strobl <marius at alchemy.franken.de> said:

>  The intention of the way it's done in OpenBSD and the patch is to
>  declare getopt(3) etc. unconditionally as done by the GNU getopt.h and
>  not in specific namespaces (like __XSI_VISIBLE etc.).

If it's not declared the same way in the same place in every version
of POSIX ever promulgated, then it needs to be in the appropriate
namespace.

-GAWollman