新增http、mqtt运行库，实现mqtt功能, 新增spdlog

thirdparty/paho_mqtt/include/MQTTProtocol.h

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+/*******************************************************************************
+ * Copyright (c) 2009, 2022 IBM Corp., Ian Craggs
+ *
+ * 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:
+ *    Ian Craggs - initial API and implementation and/or initial documentation
+ *    Ian Craggs - MQTT 3.1.1 updates
+ *******************************************************************************/
+
+#if !defined(MQTTPROTOCOL_H)
+#define MQTTPROTOCOL_H
+
+#include "LinkedList.h"
+#include "MQTTPacket.h"
+#include "Clients.h"
+
+#define MAX_MSG_ID 65535
+#define MAX_CLIENTID_LEN 65535
+
+typedef struct
+{
+	SOCKET socket;
+	Publications* p;
+} pending_write;
+
+
+typedef struct
+{
+	List publications;
+	unsigned int msgs_received;
+	unsigned int msgs_sent;
+	List pending_writes; /* for qos 0 writes not complete */
+} MQTTProtocol;
+
+
+#include "MQTTProtocolOut.h"
+
+#endif