Add sensor_type selection to DHTEndpoint

spejsiot/Endpoint.h

@@ -72,8 +72,9 @@ protected:
     void sample();
 
 public:
-    DHTEndpoint(int _pin, int _samplingRate = 10000) :
-        ValueEndpoint("dht"), sensor(_pin, DHT11), samplingRate(_samplingRate) {}
+    DHTEndpoint(int _pin, int _samplingRate = 10000, int _sensor_type=DHT11) :
+        ValueEndpoint("dht"), sensor(_pin, _sensor_type),
+        samplingRate(_samplingRate) {}
 
     void bind(String name, SpejsNode* _parent);
 };