Update: indivisual client assigns TLS connection by clients.conf file.

BugFix: TLS certificate required connection error

Signed-off-by: tomoaki <tomoaki@tomy-tech.com>

MQTTSNGateway/src/MQTTSNGWPacketHandleTask.cpp

@@ -26,6 +26,7 @@
 #include "MQTTSNGWConnectionHandler.h"
 #include "MQTTSNGWPublishHandler.h"
 #include "MQTTSNGWSubscribeHandler.h"
+#include <string.h>
 
 using namespace std;
 using namespace MQTTSNGW;