Changes

Summary

1. Cleanup shutdown() and fix race-condition (commit: bf85017) (details)

Commit bf850175e4733a144aae2a0569f280a5a811bef8 by Florian Spieß Cleanup shutdown() and fix race-condition (commit: bf85017)
	src/main/java/net/dv8tion/jda/core/entities/impl/JDAImpl.java (diff)
	src/main/java/net/dv8tion/jda/core/audio/hooks/ConnectionStatus.java (diff)