* Enable offboard gliding position setpoints
Adds a capability to make the vehicle glide when given position setpoints.
Gliding setpoints are enabled by setting POSITION_TARGET_TYPEMASK_Z_IGNORE, POSITION_TARGET_TYPEMASK_VZ_IGNORE, POSITION_TARGET_TYPEMASK_AZ_IGNORE on the typemask of position setpoints.
Include zero cruising throttle
Invalid setpoints with nan
* Handle nans for curise_throttle