Stop the RemoteStateActor when the direct addr watcher disconnects

iroh/src/magicsock/remote_map/remote_state.rs

@@ -275,7 +275,11 @@ impl RemoteStateActor {
                         self.selected_path.set(None).ok();
                     }
                 }
-                _ = self.local_addrs.updated(), if self.local_addrs.is_connected() => {
+                res = self.local_addrs.updated() => {
+                    if let Err(n0_watcher::Disconnected) = res {
+                        trace!("direct address watcher disconnected, shutting down");
+                        break;
+                    }
                     trace!("local addrs updated, triggering holepunching");
                     self.trigger_holepunching().await;
                 }