Tcp.KeepaliveConfiguration for TCP keep-alives. Keep-alive messages are probes sent on an idle connection. If no traffic is received after a certain number of probes are sent, then the connection is assumed to have been lost.
type t = {after : Duration.t;initial delay before sending probes on an idle connection
*)interval : Duration.t;interval between successive probes
*)probes : int;total number of probes to send before assuming that, if the connection is still idle it has been lost
*)}Configuration for TCP keep-alives