Fixed a deadlock on closing the multicast socket on Linux
Fixed a deadlock on closing the multicast socket on Linux

jmdns/jmdns,littlefreaky/jmdns,jmdns/jmdns,farukcank/jmdns,eastuni/jmdns,openhab/jmdns,openhab/jmdns,maggu2810/jmdns,jkiddo/jmdns,martenbr/jmdns,martenbr/jmdns,EmuxEvans/jmdns,eastuni/jmdns,EmuxEvans/jmdns,maggu2810/jmdns,jkiddo/jmdns,littlefreaky/jmdns