navigator: RTL: set loiter wp instead of normal waypoint in RTL_STATE_DESCEND
navigator: RTL: set normal waypoint instead of takeoff waypoint in RTL_STATE_CLIMB
integrate range finder into fw landing
add missing $ in rcS script
Merge remote-tracking branch 'upstream/master' into fw_landing_rangefinder
set range finder to disabled as default
fw landing: do not use relative altitudes in TECS
fix comment for FW_LND_RFRALT
px4fmu: support all actuator control groups, dynamically subscribe to required topics
Merge branch 'master' into fmu_mixer
fmu driver: bugs fixed
Merge branch 'master' into fmu_mixer
QU4D startup script
Update drv_hrt.c

TIM3 was not working properly with a custom application and I got it work changing TIM3 HRT_TIMER_POWER_BIT from RCC_APB2ENR_TIM3EN to RCC_APB1ENR_TIM3EN because on datasheet TIM3 is on APB1, I think that you should check also the others
Added rc_map_failsafe to enable use of channels other than throttle for failsafe.
Merge branch 'rc_timeout' of https://github.com/TickTock-/Firmware into rc_merged
renamed mission_switch to loiter_switch and assisted_switch to easy_switch
Added RC_MAP_FAILSAFE parameter for customizing failsafe channel.  Default to THROTTLE
Added ASSISTED, AUTO, EASY, RETURN, & LOITER programmable thresholds to enable various user mode switch configs (orig., 2x3, 1x6, etc).
Made failsafe more intuitive.  Default (0) maps to whatever channel is throttle.  If a non-zero value is entered, a direct channel map is used so use