What's Changed
* added Qiotek to USB list by tridge in https://github.com/ArduPilot/MAVProxy/pull/1229
* added SIYI camera module by tridge in https://github.com/ArduPilot/MAVProxy/pull/1230
* param: show unknown bits in bitmasks by tridge in https://github.com/ArduPilot/MAVProxy/pull/1231
* MAVExplorer: added "help FUNCTION" by tridge in https://github.com/ArduPilot/MAVProxy/pull/1232
**Full Changelog**: https://github.com/ArduPilot/MAVProxy/compare/v1.8.66...v1.8.67