These concern the TAKEOFF flight stage and address #27147.
* Logging metadata fixes
* Disabled continuous TECS reset during takeoff
* Fixed bug in reached_speed_takeoff calculation
* Limited SPDWEIGHT=2 to only first part of takeoff climb
* _post_TO_hgt_offset set to constant
* Takeoff I-gain now defaults to 0 and is used
* Use at least TRIM_THROTTLE during the climb
* Updated description of TECS_TKOFF_IGAIN with new behaviour
* Forced max throttle while below TKOFF_LVL_ALT
* Added throttle constraints in no-airspeed mode
Additionally, set_min_throttle() has been created, that allows one to
set the minimum TECS throttle for the next update_pitch_throttle() loop.
Additionally, the throttle limits system has been reworked. TECS will
receive external throttle limits from Plane and will always take them
into account and respect them.