sensor_combined

(Ran AStyle)

Disable free-fall detection when threshold is 0

Added free-fall status in vehicle_status topic

this gives control over timer capture driver

we had run out of them. _IOC_MASK is 0xFF, so we can add an extra 16
without an issue

this allows for helicopters and multicopters with SBUS output

this allows us to update fw when core config settings have changed,
such as the actuators/servos change that happened recently

needed for when px4 param system not available in ardupilot

Checking with preprocessor directives doesn't have any effect because
MULT_COUNT is an enum value rather than a macro. Thus, since MULT_COUNT is
undefined from the preprocessor perspective, even if the number of items in
`enum MULT_PORTS` (except MULT_COUNT) was greater than 33, the error wouldn't
be raised.

this is C, not C++

needed for ArduPilot build

Corrects for IMU offset from body frame origin