Check if a given ident is blocked

Given an aircraft identification, returns true if the aircraft is blocked from public tracking per request from the owner/operator, false if it is not blocked. Any IATA-like idents will be translated to ICAO before lookup. When marked as blocked, no associated flight information will be visible in AeroAPI. FlightAware can provide aircraft owner/operators with secure access to their blocked flight data by contacting FlightAware for help.