Redesign the WinDivert IOCTL interface.

The idea is to make future versions of the
WinDivert DLL compatible with older SYS and vice
versa.

The interface has also been streamlined so less
system calls are required when the handle is first
opened.

examples/streamdump/streamdump.c

@@ -187,7 +187,7 @@ int __cdecl main(int argc, char **argv)
     // Main loop:
     while (TRUE)
     {
-        if (WinDivertRecv(handle, packet, sizeof(packet), &addr, &packet_len))
+        if (!WinDivertRecv(handle, packet, sizeof(packet), &addr, &packet_len))
         {
             warning("failed to read packet (%d)", GetLastError());
             continue;