change listener errors to warnings

p2p/net/swarm/swarm_listen.go

@@ -126,7 +126,7 @@ func (s *Swarm) addConnListener(list conn.Listener) error {
 				if !more {
 					return
 				}
-				log.Errorf("swarm listener accept error: %s", err)
+				log.Warningf("swarm listener accept error: %s", err)
 			case <-ctx.Done():
 				return
 			}

package.json

@@ -134,4 +134,4 @@
   "gx": {
     "dvcsimport": "github.com/ipfs/go-libp2p"
   }
-}
+}
\ No newline at end of file