New "fence" feature on group rides

[Johann_Gilles_PACK_H (Johann)]

Siehe meinen Beitrag vom 6. Oktober, dies ist der Grund:

Calculation of distances in Zwift

Calculation of the distances between riders / riders or riders / fences. Zwift calculates the distances between riders of a group orrace based on the straight line between them and outputs them in the right HUD as a time difference (+ - difference). On a straight line this may be correct, but on wi…