Adding documentation of two new campaign related options
Adding documentation of two new campaign related options

Adding documentation of "campaign_check" and "campaign_accept" which
needs developer review.

advancedtelematic/sota_client_cpp,advancedtelematic/aktualizr,advancedtelematic/aktualizr,advancedtelematic/aktualizr,advancedtelematic/aktualizr,advancedtelematic/sota_client_cpp