fix close socket

[jan-bogaerts]

On some devices, the close method remained stuck: the UdpReceiverTask would never stop. This can be fixed by adding a timeout to the socket.

[Rapsssito]

If UdpReceiverTask never stops, it might be better to close the thread executor instead of adding a timeout to the socket.

[jan-bogaerts]

If UdpReceiverTask never stops, it might be better to close the thread executor instead of adding a timeout to the socket.

not really cause internally, the socket will still not be closed.

[Rapsssito]

@jan-bogaerts, oh, I understand. Then, the issue is how the task is being handled. I will try to add a thread handler asap.