implement #4412

LuaSyncedCtrl API change:
  old: Spring.SetUnitMoveGoal(num unitID, num goalx, num goaly, num goalz [, num goalRadius [, num moveSpeed ]]] )
  new: Spring.SetUnitMoveGoal(num unitID, num goalx, num goaly, num goalz [, num goalRadius [, num moveSpeed [, bool moveRaw ]]] )