Xconq for Windows

[Jim Kingdon]

> I have been thinking about moving the relevant parts of x11/xconq.c
> into a new tcltk/tkunix.c file for the same reason (just like I did
> with wconq.c). And then make the tcltk app for unix build in the tcltk
> directory. The x11 directory should only contain xtconq sources.

I like this one a lot.  xtconq and the unix tcltk xconq don't share
enough code to justify the current setup, which is confusing.  I'd
just copy stuff over (and not worry about duplicating it; x11/xconq.c
is s small file).

I'm more or less indifferent to the rest of the changes you propose.