Codechange: [Network] Use std::string for the client name in the network server

src/network/network_server.h

@@ -79,7 +79,7 @@ public:
 
 	virtual Packet *ReceivePacket() override;
 	NetworkRecvStatus CloseConnection(NetworkRecvStatus status) override;
-	void GetClientName(char *client_name, const char *last) const;
+	std::string GetClientName() const;
 
 	void CheckNextClientToSendMap(NetworkClientSocket *ignore_cs = nullptr);