Should we also send "Connection: Close" ?

Hi, This module seems to do everything the correct way but I wonder would it be more correct to also send the "Connection: Close" header to the client on the last inflight request before closing the socket? Otherwise we will end "Connection: Keep-Alive" back and the client will not be expecting the socket to close.

i.e. the logic would go here: https://github.com/hunterloftis/stoppable/blob/master/lib/stoppable.js#L27