Solidify should extrude Vertex Creases into rim Edge Creases

Mode: Complex automatically creases cnroners, but it'd give better nondestructive control to take into account Vertex Crease for both modes, maybe with a toggle in the rare case it isn't wanted. This makes more complex shapes possible with a Subsurf after Solidify in the modifier stack.

• The two shapes on the right are the two modes of Solidify demonstrating undesirable results.
• The shape on the left is the desirable result if Vertex Creases were extruded into Edge Creases.