Proper destruction of sockets (crashed previously).

src/net/common/clientcontext.cpp

@@ -53,6 +53,7 @@ ClientContext::~ClientContext()
 {
 	m_senderThread->SignalStop();
 	m_senderThread->WaitStop();
+	m_senderThread.reset();
 	m_sessionData.reset();
 }
 

src/net/common/serverlobbythread.cpp

@@ -71,7 +71,7 @@ public:
 	}
 	virtual void SignalSessionTerminated(unsigned session)
 	{
-		m_server.GetSender();
+		m_server.GetSender().SignalSessionTerminated(session);
 	}
 
 private: