Fix all found race conditions, and dont send on nil channel #307
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Some locking was incorrect, a lot was missing, i fixed all race conditions i could find using the
-race
detector on different bots.I have tested shorter voice connections by having a bot connect to voice, play a 2 second long audio file, then disconnect, every 5 seconds for some hours.
Tested longer connections by having a music bot play a track on loop for a couple hours.
This will lower performance a bit, but it's better than to rely on undefined behaviour.
This pr is probably gonna be annoying to go through with all the new locking, sorry about that.