rename start method

src/ebusd/datahandler.h

@@ -110,7 +110,7 @@ class DataHandler {
   /**
    * Called to start the @a DataHandler.
    */
-  virtual void start() = 0;
+  virtual void startHandler() = 0;
 
   /**
    * Return whether this is a @a DataSink instance.

src/ebusd/mainloop.cpp

@@ -231,7 +231,7 @@ void MainLoop::run() {
     if (dataHandler->isDataSink()) {
       dataSinks.push_back(dynamic_cast<DataSink*>(dataHandler));
     }
-    dataHandler->start();
+    dataHandler->startHandler();
   }
   while (!m_shutdown) {
     // pick the next message to handle

src/ebusd/mqtthandler.cpp

@@ -1171,7 +1171,7 @@ MqttHandler::~MqttHandler() {
   mosquitto_lib_cleanup();
 }
 
-void MqttHandler::start() {
+void MqttHandler::startHandler() {
   if (m_mosquitto) {
     WaitThread::start("MQTT");
   }

src/ebusd/mqtthandler.h

@@ -281,7 +281,7 @@ class MqttHandler : public DataSink, public DataSource, public WaitThread {
   virtual ~MqttHandler();
 
   // @copydoc
-  void start() override;
+  void startHandler() override;
 
   /**
    * Notify the handler of a (re-)established connection to the broker.