Add error message if input from config file is unknown

src/includes/ConfiguratorTemplate.h

@@ -101,7 +101,6 @@ public:
 
 		//read groups and templates for groups. If present also entity/-template stuff
 		BOOST_FOREACH(boost::property_tree::iptree::value_type &val, cfg) {
-			//TODO allow single sensors for convenience?
 			//template entity
 			if (boost::iequals(val.first, "template_" + _entityName)) {
 				LOG(debug) << "Template " << _entityName << " \"" << val.second.data() << "\"";
@@ -232,6 +231,9 @@ public:
 						delete group;
 					}
 				}
+			} else {
+			    LOG(error) << "\"" << val.first << "\": unknown construct!";
+			    return false;
 			}
 		}
 		//read of config finished. Now we build the mqtt-topic for every sensor

src/sensors/perfevent/PerfeventConfigurator.cpp

@@ -175,7 +175,10 @@ bool PerfeventConfigurator::readConfig(std::string cfgPath) {
 					LOG(warning) << _groupName << " \"" << val.second.data() << "\" has bad values! Ignoring...";
 				}
 			}
-		}
+		} else {
+		    LOG(error) << "\"" << val.first << "\": unknown construct!";
+            return false;
+        }
 	}
 	//read of config finished. Now we build the mqtt-topic for every sensor
 	for(auto g : _sensorGroups) {