First pass at native Win32 support (does not compile).

First pass at native Win32 support (does not compile).

src/compat.h: Handle Windows Sockets 2 headers.

src/mod-memoserv.c (KEY_READ): #undef'ine to avoid its registry access
    meaning on Windows.

Makefile.win32: New Makefile for native or cross builds targeting Win32.

src/config.h.win32: Pregenerated config.h for Win32.

src/ioset-win32.c: First attempt at a Win32 ioset backend.
git-archimport-id: srvx@srvx.net--2006/srvx--devo--1.3--patch-41