hello again when heard from

While we wait for a peer's HELLO_REPLY, anything else that comes from it
makes our HELLO go again at once, at most once a second, instead of when
the backoff says.

1 files changed, 4 insertions, 1 deletions

diff --git a/docs/peers.md b/docs/peers.md
index be04b16..cacceb5 100644
--- a/docs/peers.md
+++ b/docs/peers.md
@@ -114,7 +114,10 @@ With a swarm key (`--swarm-key-file`), every HELLO and HELLO_REPLY carries
 until then everything else it sends is ignored, and a handshake without a valid proof
 gets no answer at all.
 
-Retries: an unanswered HELLO is resent after 1 s, doubling up to 30 s. To an
+Retries: an unanswered HELLO is resent after 1 s, doubling up to 30 s, but at once
+(at most every second) when anything else comes from the peer meanwhile: it is up and
+reaches us, so the HELLO or its reply was lost, and waiting out the backoff (or a
+probe's) would only delay the handshake. To an
 unreachable peer (dormant, or three unanswered HELLOs) it is a probe: after
 `dormant_probe`, doubling up to 6 × `dormant_probe` (or `--dormant-probe-max`, which is
 every wait if shorter); members get probes even when they