[Suggestion] Shutdown command

[Fensfield]

I would like one as well, not for me but for everyone on my server. I don't know how many times I wrote /shutdown to the whole world

But any improper / command returns an error, it doesn't emit to your surroundings...

Still I couldn't see this suggestion hurting. And to add to the above, as well as using UI changes, it also aborts the most recent set of logfiles being created.