Adding upstream version 3.10.8.

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

util/rand.go

@@ -0,0 +1,23 @@
+// Copyright Earl Warren <contact@earl-warren.org>
+// Copyright Loïc Dachary <loic@dachary.org>
+// SPDX-License-Identifier: MIT
+
+package util
+
+import (
+	"math/rand"
+	"time"
+)
+
+var (
+	letters = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
+	random  = rand.New(rand.NewSource(time.Now().UnixNano()))
+)
+
+func RandSeq(n int) string {
+	b := make([]rune, n)
+	for i := range b {
+		b[i] = letters[random.Intn(len(letters))]
+	}
+	return string(b)
+}