Implement shutdown handling to close WS clients cleanly #1102
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Lavalink does not currently implement a shutdown hook to close connected websocket clients. As a result, clients will see their websocket connections improperly closed, typically with code
1006.With this change, the server should now cleanly close connections with code
1001("GOING AWAY") when shutting down gracefully (i.e. upon receivingSIGINT).