Global UTM Data Exchange Protocols

#### Issue details
For awareness/consideration.
GUTMA has published protocols for flight declaration and recording:
https://bitbucket.org/account/user/global_utm/projects/DXP
There may be value in adding support for these as options.

#### Version
_What version was the issue encountered with_

#### Platform
[ ] All
[ ] AntennaTracker
[ ] Copter
[ ] Plane
[ ] Rover
[ ] Sub

#### Airframe type
_What type of airframe (flying wing, glider, hex, Y6, octa etc)_

#### Hardware type
_What autopilot hardware was used? (pixhawk, pixracer, PX4FMU etc)_

#### Logs
_Please provide a link to any relevant logs that show the issue_

Review the linked GUTMA DXP project, focusing on its flight-declaration and recording protocols, then compare them with Mission Planner's current capabilities. Define which protocols and options are in scope; done should mean that the selected GUTMA protocols are supported as usable options.

Written by the indexing model from the issue text.