Merge in Windows port using mingw and make.

include/9windows.h

@@ -0,0 +1,18 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <math.h>
+#include <fcntl.h>
+#include <io.h>
+#include <setjmp.h>
+#include <direct.h>
+#include <process.h>
+#include <time.h>
+#include <assert.h>
+#include <stdarg.h>
+
+/* disable various silly warnings */
+#pragma warning( disable : 4245 4305 4244 4102 4761 4090 4028 4024)
+
+typedef __int64		p9_vlong;
+typedef	unsigned __int64 p9_uvlong;

include/dtos.h

@@ -4,7 +4,7 @@
 #		define panic dt_panic
 #	endif
 #elif defined(WINDOWS)
-#	include "winduhz.h"
+#	include "9windows.h"
 #else
 #	error "Define an OS"
 #endif