setsockopt
==========

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

Gnulib module: setsockopt

Portability problems fixed by Gnulib:

  * On Windows platforms (excluding Cygwin), error codes for setsockopt are not placed in errno, and WSAGetLastError must be used instead.

Portability problems not fixed by Gnulib:

  * Many socket options are not available on all platforms.