feat: Add GossipDiscovery and thus make broadcasting our addressing information optional

README.md

@@ -1,7 +1,7 @@
 # iroh-gossip
 
 This crate implements the `iroh-gossip` protocol.
-It is based on *epidemic broadcast trees* to disseminate messages among a swarm of peers interested in a *topic*. 
+It is based on *epidemic broadcast trees* to disseminate messages among a swarm of peers interested in a *topic*.
 The implementation is based on the papers [HyParView](https://asc.di.fct.unl.pt/~jleitao/pdf/dsn07-leitao.pdf) and [PlumTree](https://asc.di.fct.unl.pt/~jleitao/pdf/srds07-leitao.pdf).
 
 The crate is made up from two modules:
@@ -28,7 +28,7 @@ async fn main() -> anyhow::Result<()> {
     let endpoint = Endpoint::builder().discovery_n0().bind().await?;
 
     // build gossip protocol
-    let gossip = Gossip::builder().spawn(endpoint.clone()).await?;
+    let gossip = Gossip::builder().spawn(endpoint.clone());
 
     // setup router
     let router = Router::builder(endpoint.clone())