Add some extra thread safety to the network events module

Author: aacuevas

Source/Plugins/NetworkEvents/NetworkEvents.cpp

@@ -216,8 +216,14 @@ bool NetworkEvents::closesocket()
         zmq_ctx_destroy (zmqcontext); // this will cause the thread to exit
         zmqcontext = nullptr;
 
+		if (!stopThread(500))
+		{
+			std::cerr << "Network thread timeout. Forcing thread termination, system could be lefr in an unstable state" << std::endl;
+		}
+
         if (! shutdown)
             createZmqContext();// and this will take care that processor graph doesn't attempt to delete the context again
+	
     }
 #endif
     return true;

Source/Plugins/NetworkEvents/NetworkEvents.h

@@ -117,7 +117,7 @@ class NetworkEvents : public GenericProcessor
 
     int urlport;
     String socketStatus;
-    bool threadRunning;
+    std::atomic<bool> threadRunning;
 
 
 private: