Adding upstream version 3.10.8.

Signed-off-by: Daniel Baumann <daniel@debian.org>

util/retry.go

@@ -0,0 +1,33 @@
+// Copyright Earl Warren <contact@earl-warren.org>
+// Copyright Loïc Dachary <loic@dachary.org>
+// SPDX-License-Identifier: MIT
+
+package util
+
+import (
+	"fmt"
+	"time"
+)
+
+func retry(fun func()) (status interface{}) {
+	defer func() {
+		status = recover()
+	}()
+
+	fun()
+
+	return status
+}
+
+func Retry(fun func(), tries int) {
+	errors := make([]interface{}, 0, tries)
+	for i := 0; i < tries; i++ {
+		err := retry(fun)
+		if err == nil {
+			return
+		}
+		errors = append(errors, err)
+		<-time.After(1 * time.Second)
+	}
+	panic(fmt.Errorf("Retry: failed %v", errors))
+}