add links messages

Introduce two new wire messages, LINKS and LINKS_REPLY (swarm::links).
A member answers with its links: for each peer, the transport, whether
it’s relayed, the RTT, and whether it’s dormant.  It answers members
only, at most every 5 s.  This bumps wire::VERSION to 7.  Every build
answers, with or without the feature, so every node needs this patch
before the map shows anything beyond its own node.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/node.rs b/src/node.rs
index 8aab601..be722e6 100644
--- a/src/node.rs
+++ b/src/node.rs
@@ -114,6 +114,7 @@ impl Node {
             alias: config.alias,
             electorate_window: config.electorate_window,
             blobs: Arc::new(swarm::blob::Blobs::new(config.blob_chunk_bytes)),
+            links: Default::default(),
             protocol_writers: Arc::new(config.protocol_writers),
             state_file: config.state_file,
             document_file: config.document_file,