false connections if geometry is a tubular mesh

[fstwn]

Horrible connection failures have been observed on a tubular test mesh.

• Behaviour seems to occur when creating final warp connections.
• Behaviour has been observed with ContinuousEnd setting but is not necessarily related.

it should be noted that on a nurbs surface of the same geometry the problem does not occur.

A relation to the difference in generation of KnitContours is possible.

[fstwn]

This is related to the routine for using the least angle change connection. We need a failsafe here to prevent "parallel" edges from accross the tube being used.

[fstwn]

Maybe implement some reference geometry query to deal with this