Possible unintended drag effects under high latency

[Skeletonxf]

Hi

First of all, thanks for making this mod open source. I found a potential issue while porting the code from new movement physics into my mod.

if(spacetimeDrag) {
    vec3d drag = obj.velocity * spacetimeDragCoefficient * time;
    obj.velocity = obj.velocity - drag;

this snippet in the Mover component that calculates drag might cause an object to fly backwards if time is large enough. The base coefficient is 0.09 so a time of 10 would still leave drag at 0.9, but if there's sufficient lag time could be more than 10, and other mods porting or building on new movement physics can apply their own coefficients on top of the base, so they could make the base coefficient bigger. In either case, you could plausibly end up with a drag which is larger than the object's velocity which would make it flip directions. In a really worst case scenario, if drag ended up larger than two times obj.velocity, this would cause a ship to fly out of the galaxy at increasing speed.