Do not log 'use of closed network connection' error when closing listener in Server.Serve*

server.go

@@ -8,6 +8,7 @@ import (
 	"log"
 	"net"
 	"os"
+	"strings"
 	"sync"
 	"sync/atomic"
 	"time"
@@ -320,7 +321,7 @@ func acceptConn(s *Server, ln net.Listener, lastPerIPErrorTime *time.Time) (net.
 				time.Sleep(time.Second)
 				continue
 			}
-			if err != io.EOF {
+			if err != io.EOF && !strings.Contains(err.Error(), "use of closed network connection") {
 				s.logger().Printf("Permanent error when accepting new connections: %s", err)
 			}
 			return nil, err