Graceful shutdown futures lite#766

Draft

GWBasic wants to merge 4 commits intohttp-rs:mainfrom

GWBasic:GracefulShutdown_FuturesLite

Commits on Dec 16, 2020

Merge pull request #1 from http-rs/main
GWBasic
authored
First pass at allowing a cancelable http server
Andrew Rondeau
committed
First attempt at testing canceling the server
Andrew Rondeau
committed
Added brief note about async tests
Andrew Rondeau
committed