Allowing fRef to be in the PN-extended range.
Allowing fRef to be in the PN-extended range.

This change only affects the case when TF2 extension takes place.
- in Core, it fRef is below Mf_ROM_min, defaults to Mf_ROM_max
- kept this, removed warning that fRef is outside range and that is reset
- added re-adjustment of phiRef after the extension
This is not optimal (rebuilds a spline).

JohnGBaker/flare,JohnGBaker/flare,JohnGBaker/flare