sockets: MS Windows initalization fixes Problem reported by Test User in: http://lists.gnu.org/archive/html/help-shishi/2015-09/msg00001.html * lib/sockets.h (SOCKETS_1_0, SOCKETS_2_0, SOCKETS_2_1): Correct the endianness. * lib/sockets.c (gl_sockets_startup): Return 2 on any version number mismatch, not just on <. Cleanup before any such failure.