swarm: no SIGNATURES

Signatures sent on their own (SIGNATURES, every second, to each peer
not sent them yet) flooded every link: a signature made after its
change left, or one that came with changes, went to every neighbour,
whether or not it got the change along with its signature elsewhere.

With every change of a node signed as it leaves (1217) and signatures
going where their changes go (1218), none is left for them to carry:
the message, its task and its traffic counter go (wire version 46).
Signatures waiting for their changes are offered as before when sync
messages bring them, and the changes waiting for signatures judged
again with the next batch.

1 files changed, 1 insertions, 2 deletions

diff --git a/docs/architecture.md b/docs/architecture.md
index ef7928e..d867d4a 100644
--- a/docs/architecture.md
+++ b/docs/architecture.md
@@ -77,7 +77,7 @@ it switched to the right document without trusting anyone.
 ## Modules
 
 **[`transport/`](../src/transport/)** — [`mod.rs`](../src/transport/mod.rs) defines the message types (HELLO, HELLO_REPLY, sync
-envelope, STATUS/STATUS_REPLY, PING/PONG, blob messages, PROBE/PROBE_REPLY, SIGNATURES, REFUSALS) and the `Transport` trait;
+envelope, STATUS/STATUS_REPLY, PING/PONG, blob messages, PROBE/PROBE_REPLY, REFUSALS) and the `Transport` trait;
 [`wire.rs`](../src/transport/wire.rs) is the wire format (a version byte, bumped with every change to the format,
 and a kind byte, then the message in MessagePack, derived from the types in [`mod.rs`](../src/transport/mod.rs)
 with codecs for hashes and IDs); [`mycelium/`](../src/transport/mycelium/) (with the `mycelium` feature) is the REST
@@ -118,7 +118,6 @@ ignored 25-node soak test with a propagation bound (`cargo test soak -- --ignore
 | `tree` | writers' trees: passing each writer's changes on to the members after us in its tree, the same on every node | [`peers.md`](peers.md) |
 | `reach` | whom each neighbour reaches, as it says in its STATUS: the 2-hop neighbourhood trees are built on | [`peers.md`](peers.md) |
 | `relay` | announcing heads where trees don't reach (at once) and to everyone else (slow round), and pulling what's missing | module docs |
-| `signatures` | sending signatures of changes that no sync message took, every second | [`api.md`](api.md), Signed changes |
 | [`topology/`](../src/swarm/topology/) | which members are neighbours: ring plus low-score links, stable members preferred | module docs |
 | `members` | the member registry: aliases, alive stamps, tiers, the electorate | module docs |
 | `stability` | a node's own connectivity record and its stable/transient tier | module docs |