Merge branch 'master' into jgrpp-beta

# Conflicts:
#	.github/workflows/ci-build.yml
#	src/lang/german.txt
#	src/lang/romanian.txt
#	src/lang/slovak.txt
#	src/lang/turkish.txt
#	src/network/core/address.cpp
#	src/network/core/tcp.h
#	src/network/core/udp.cpp
#	src/network/network.cpp
#	src/network/network_client.cpp
#	src/network/network_server.cpp
#	src/network/network_server.h
#	src/network/network_udp.cpp
#	src/openttd.cpp
#	src/saveload/newgrf_sl.cpp
#	src/tree_cmd.cpp
#	src/video/video_driver.hpp
#	src/window.cpp
#	src/window_gui.h

src/network/core/tcp_content.h

@@ -21,7 +21,7 @@
 /** Base socket handler for all Content TCP sockets */
 class NetworkContentSocketHandler : public NetworkTCPSocketHandler {
 protected:
-	void Close() override;
+	void CloseSocket();
 
 	bool ReceiveInvalidPacket(PacketContentType type);
 
@@ -128,7 +128,11 @@ public:
 	}
 
 	/** On destructing of this class, the socket needs to be closed */
-	virtual ~NetworkContentSocketHandler() { this->Close(); }
+	virtual ~NetworkContentSocketHandler()
+	{
+		/* Virtual functions get called statically in destructors, so make it explicit to remove any confusion. */
+		this->CloseSocket();
+	}
 
 	bool ReceivePackets();
 };