From e2b5835e64163a7eaf74e9036b74f1f39848ffdf Mon Sep 17 00:00:00 2001
From: Piotr Tabor <ptab@google.com>
Date: Thu, 18 Mar 2021 19:44:28 +0100
Subject: [PATCH] Fix go-tip: (1.17) fmt error:

```
gofmt' started at Thu Mar 18 18:06:00 UTC 2021
transport/sockopt_unix.go
diff -u transport/sockopt_unix.go.orig transport/sockopt_unix.go
--- transport/sockopt_unix.go.orig	2021-03-18 18:06:01.667483834 +0000
+++ transport/sockopt_unix.go	2021-03-18 18:06:01.667483834 +0000
@@ -1,3 +1,4 @@
+//go:build !windows
 // +build !windows

 package transport
transport/sockopt_windows.go
diff -u transport/sockopt_windows.go.orig transport/sockopt_windows.go
--- transport/sockopt_windows.go.orig	2021-03-18 18:06:01.667483834 +0000
+++ transport/sockopt_windows.go	2021-03-18 18:06:01.667483834 +0000
@@ -1,3 +1,4 @@
+//go:build windows
 // +build windows
```
---
 pkg/transport/sockopt_unix.go    | 1 +
 pkg/transport/sockopt_windows.go | 1 +
 2 files changed, 2 insertions(+)

diff --git a/pkg/transport/sockopt_unix.go b/pkg/transport/sockopt_unix.go
index a3322fded..3ed3949f7 100644
--- a/pkg/transport/sockopt_unix.go
+++ b/pkg/transport/sockopt_unix.go
@@ -1,3 +1,4 @@
+//go:build !windows
 // +build !windows
 
 package transport
diff --git a/pkg/transport/sockopt_windows.go b/pkg/transport/sockopt_windows.go
index 000077991..4e5af70b1 100644
--- a/pkg/transport/sockopt_windows.go
+++ b/pkg/transport/sockopt_windows.go
@@ -1,3 +1,4 @@
+//go:build windows
 // +build windows
 
 package transport