Update dependency docker/spdystream to moby/spdystream

docker/spdystream has been moved to moby/spdystream.

Signed-off-by: Aditi Sharma <adi.sky17@gmail.com>

vendor/github.com/moby/spdystream/utils.go

@@ -0,0 +1,32 @@
+/*
+   Copyright 2014-2021 Docker Inc.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package spdystream
+
+import (
+	"log"
+	"os"
+)
+
+var (
+	DEBUG = os.Getenv("DEBUG")
+)
+
+func debugMessage(fmt string, args ...interface{}) {
+	if DEBUG != "" {
+		log.Printf(fmt, args...)
+	}
+}