x11/blt: please package tkblt

[Thomas Klausner <wiz%NetBSD.org@localhost>]

Hi!

x11/blt is broken; it depends on tk 8.6 but the code is much older
than that release and not fully compatible.

It is used by cad/magic and net/ttt.

There is a port of blt for tk 8.6 here:

https://github.com/wjoye/tkblt

Can someone who is interested in either of the three packages please
package tkblt and switch the other packages to use it?

Otherwise I think it's probably best to remove the three packages,
since they won't work as-is currently.

Thanks,
 Thomas