Split responsibilities: msg_config|_resp
Split responsibilities: msg_config|_resp

Break into other functions that performs:
- Trust list management
- JSON object creation/parsing

CESARBR/knot-service-source,CESARBR/knot-service-source,CESARBR/knot-service-source,CESARBR/knot-service-source,CESARBR/knot-service-source