Azure connection status management

connection_status_mgmt.c

static void
s_azure_client_connection_status_cb(
   IOTHUB_CLIENT_CONNECTION_STATUS result,
   IOTHUB_CLIENT_CONNECTION_STATUS_REASON reason,
   void * ctx)
{
   const char * connection_results[] =
   {
      "ONLINE",
      "OFFLINE"
   };
   const char * connection_reasons[] =
   {
      "EXPIRED SAS TOKEN",
      "DEVICE DISABLED",
      "BAD CREDENTIAL",
      "RETRY EXPIRED",
      "NO NETWORK",
      "COMMUNICATION ERROR",
      "OK"
   };
   
   UNUSED(ctx);

   TRACE("Azure connection status: %s; reason: %s",
         connection_results[result], connection_reasons[reason]);
   return;
}