Smooth connection and disconnection complete

The clients can connect and disconnect from the server with known no
issues. There is no way to shutdown the server yet, but it might be
possible to kick someone else from the server soon.

libs/common/network_queue.cpp

@@ -31,7 +31,7 @@ static int networkQueue(void*) {
 	return 0;
 }
 
-void BeginQueueThread() {
+void beginQueueThread() {
 	if (running) {
 		return;
 	}
@@ -41,7 +41,7 @@ void BeginQueueThread() {
 	}
 }
 
-void EndQueueThread() {
+void endQueueThread() {
 	if (!running) {
 		return;
 	}
@@ -50,7 +50,7 @@ void EndQueueThread() {
 	queueThread = nullptr;
 }
 
-void KillQueueThread() {
+void killQueueThread() {
 	if (!running) {
 		return;
 	}
@@ -78,4 +78,12 @@ Packet popNetworkPacket() {
 	}
 	SDL_SemPost(lock);
 	return p;
+}
+
+void flushNetworkQueue() {
+	UDPNetworkUtility* netUtil = ServiceLocator<UDPNetworkUtility>::Get();
+	SDL_SemWait(lock);
+	while(netUtil->Receive());
+	queue.clear();
+	SDL_SemPost(lock);
 }