data: geoclue.conf.in: Add URL and API key for the Positon location service
Allow users and distributions to opt into using the Positon (https://positon.xyz) geolocation service for wifi and cell tower locations.
The API key that's used here was assigned to geoclue by Positon, and may be used by non-commercial re-distributors of geoclue as well.
See also #200 (closed)