* delays can now be negative to support sniffed transition times from one waypoint path to another
* early transitions will now pick up the ongoing spline destination and start calculating their path from that point on
* waypoints may now use db side spline pathings in a new db table to support special spline shapes are not generated by normal pathfinding (e.g. scripted flight paths)
* current waypoints will still the work the way they did before for legacy and custom support