Plane 4.2.1

What's Changed

• fixed a bug in handling wrap in log download when 500 logs are on the microSD card
• added FlyingMoonF407 and FlyingMoonF427 support
• fixed RSSI input on the RCIN pin on CubeBlack and CubeOrange
• fixed update of gyro FFT throttle tracking
• removed unhealthy reporting on airspeed sensors with negative pressure as this commonly happens on VTOL takeoff
• improved handling of large LOITER_TURNS mission items, expanding maximum to 2.5km
• added fuel usage integration on Lutan EFI
• refuse arming in AUTO when in a landing sequence due to a failsafe
• account for sprung throttle (from RC_OPTIONS) in throttle suppression code
• improved safety of in-flight compass learning
• fixed automatic airspeed ratio calibration for 2nd airspeed sensor
• increase safety of GUIDED -> AUTO takeoff sequence used by QGC
• added CAN_Dx_UC_ESC_OF parameter for ESC offset for bandwidth efficiency
• fixed handling of safety state on boards with no safety switch
• fixed bug where a false positive could trigger landing disarm while land repositioning is active