As described by
https://www.ietf.org/archive/id/draft-spaghetti-idr-bgp-sendholdtimer-04.html
Since this replicates the HoldTime check on the receiver that is already
part of the protocol, I do not believe it necessary to wait for IETF
progress on this draft. It's just replicating an existing element of
the protocol at the other side of the session.
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>