Motor arm/disarm with a radio switch

Latest is 3.7-dev. Be warned: it’s not a stable release. Results may vary.

Thanks, where do I get it?

Does anyone know how to set prearm switch? (not hardware safety switch, but on the RC)
The FPV pilots are using this kind of safety arming, but they are on Betaflight, not Arducopter.
I know I can use internal logical conditions on my radio controller but in this case that’s not the main goal.

RCx_OPTION 41 is used for switch Arming/Disarming if that’s your question.