Audit fixes

hub/handlers.go

@@ -29,6 +29,8 @@ func (a *App) _signin(s *api.Session, w http.ResponseWriter, r *http.Request) er
 }
 
 func (a *App) _signinSubmit(s *api.Session, w http.ResponseWriter, r *http.Request) error {
+	// Ignoring error here - if host is the empty string, it will contend for the
+	// lock anyway.
 	host, _, _ := net.SplitHostPort(r.RemoteAddr)
 	if !a.signInLock.TryLock(host) {
 		time.Sleep(time.Second + time.Duration(rand.Int64N(int64(3*time.Second))))

peer/app_test.go

@@ -26,6 +26,7 @@ func addRelayPeer(t *testing.T, a *App, vpnIP string, ep netip.AddrPort) *Peer {
 	})
 	p := a.peersByKey[key]
 	p.wgPeer.LastHandshakeTime = time.Now()
+	p.LastPing = time.Now()
 	return p
 }