Recent change to:

https://github.com/tendermint/tendermint/blob/master/libs/autofile/sighup_watcher.go#L19-L25

To capture interrupt signal (and so disable default golang runtime behaviour) stop unrelated things we have in our binary from exiting on Ctrl-C (e.g. grpcServer.Serve). It would be better hygiene if NewNode could activate these explicitly rather than doing it globally like this in init.