Advertise desktop clients and log unknown automatic candidates

tools/chatgui/transport/utun_node.cpp

@@ -197,6 +197,8 @@ void UtunNode::runLoop() {
         return;
     }
     cfg->global.db_sync_enabled = 1;
+    cfg->global.client_type = CLIENT_TYPE_DESKTOP;
+    DEBUG_INFO(DEBUG_CATEGORY_CHAT_SYNC, "chatgui: device=desktop; supernode role is channel-specific");
     if (!m_dbPath.isEmpty())
         snprintf(cfg->global.db_path, sizeof(cfg->global.db_path), "%s", m_dbPath.toUtf8().constData());