Re-sends a stream's response at every rotation period until the client has gone; a failure to re-mint is logged and retried at the next rotation.
sends a message; returns false once the client has gone
builds the next response
what is being re-sent, for the log
Optional
when given, answers the shortest lifetime the last response carried
the timer's handle
Re-sends a stream's response at every rotation period until the client has gone; a failure to re-mint is logged and retried at the next rotation.