Fix all the: Cannot schedule tasks on an EventLoop that has already shut down

[Konrad `ktoso` Malawski]

Sigh, it's back; ERROR: Cannot schedule tasks on an EventLoop that has already shut down. This will be upgraded to a forced crash in future SwiftNIO versions.

So hard and annoying to diagnose but we'll figure it out; We need to throw in a backtrace to where this prints to even know where these happen