[evlatests] u,v,w, and UVFIX

[Barry Clark]

Ed Fomalont <efomalon at nrao.edu> wrote:

> I think it was agreed many years ago to not change the u,v,w 
> calculation on line.

This was because the Modcomp debugging environment is rather difficult
for such small effects; plus, there is the necessary increment in the 
record version number, and propagating to all users just what that meant.
The environment is rather better now, and perhaps we should reconsider.