removal of dxf term from default build

[Karl-Friedrich R. <mai...@gm...>]

Hi,

last week two old legacy terminals were removed from the default
target in the 5.1cvs tree. While corel is indeed likely not useful
any more, I wanted to point out that Autodesk's dxf is still the
standard 2D vector exchange format, that can be read in by every
program in the CAD/CAM business.

Especially some of the freeware CAD suites just cannot construct
lines via mathematical formulas, and it's still a hassle imo with
e.g. Inventor.

So, unless it becomes really broken, it'd be nice to keep it at
least in future binaries, for those who cannot easily make their own
build. As long as you can do simple black and white line plots, it's
still useful.

Best, Karl