bug#6602: [PATCH] make dist target for Windows

[Sean Sieger]

    One question. Why do you pass "--without-tiff --without-gif --with
    out-jpeg --without-png" to configure?

Because I thought it was my experience that configure coughs if it
hasn't been passed these and cannot find the requisite dlls.

    We don't distribute binaries for the tiff, gif, jpeg and png
    libraries, but that does not mean that you cannot build a binary that
    supports them, if the user provides them.

Noted.  I'll try again.