start mqtt client (based on paho.mqtt.c), basically works

3rd/paho.mqtt.c/src/Proxy.h

@@ -0,0 +1,29 @@
+/*******************************************************************************
+ * Copyright (c) 2009, 2025 Diehl Metering, Ian Craggs and others
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v2.0
+ * and Eclipse Distribution License v1.0 which accompany this distribution.
+ *
+ * The Eclipse Public License is available at
+ *    https://www.eclipse.org/legal/epl-2.0/
+ * and the Eclipse Distribution License is available at
+ *   http://www.eclipse.org/org/documents/edl-v10.php.
+ *
+ * Contributors:
+ *    Sven Gambel - move WebSocket proxy support to generic proxy support
+ *******************************************************************************/
+
+#if !defined(PROXY_H)
+#define PROXY_H
+
+#include "Clients.h"
+
+/* Notify the IP address and port of the endpoint to proxy, and wait connection to endpoint */
+int Proxy_connect(networkHandles *net, int ssl, const char *hostname);
+
+int Proxy_noProxy(const char* dest, char* no_proxy);
+
+int Proxy_setHTTPProxy(Clients* aClient, char* source, char** dest, char** auth_dest, char* prefix);
+
+#endif /* PROXY_H */