Github permissions update

Hi All,
github has finally added team based permissions to branches. This means we can finally enforce that the master branch can only be written by the right people.
I have setup master on ardupilot, PX4Firmware, PX4NuttX, mavlink and uavcan to be only written by the ArduPilot Maintainers team. Please let me know if there are other changes needed or if this causes a problem.
Cheers, Tridge

@tridge I was trying to setup the same for APM Planner 2.0, but I’m not sure i see how to restrict people in the Issue List group not to be able to find a setting to restrict pushing to master.

maybe I missed it