diydrones/ardupilot — pull request #1191 by apmKrauser (2014-07-04 21:06:17+00:00)
Title: Arducopter/AP_Mount: retract camera mount near ground

Automatically retract camera mount in flightmodes stabilize, rtl, land if altitude is below mnt_autortrct_h.
This should prevent crashes while landing copter which need a retracted mount before touching the ground.