safesocket: remove the IPN protocol support

Updates #6417

Change-Id: I78908633de842d83b2cc8b10a864a0f88ab1b113
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>

version/cmp_test.go

@@ -2,16 +2,20 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package version
+package version_test
 
 import (
 	"testing"
 
 	"github.com/google/go-cmp/cmp"
 	"tailscale.com/tstest"
+	"tailscale.com/version"
 )
 
 func TestParse(t *testing.T) {
+	parse := version.ExportParse
+	type parsed = version.ExportParsed
+
 	tests := []struct {
 		version string
 		parsed  parsed
@@ -71,7 +75,7 @@ func TestAtLeast(t *testing.T) {
 	}
 
 	for _, test := range tests {
-		got := AtLeast(test.v, test.m)
+		got := version.AtLeast(test.v, test.m)
 		if got != test.want {
 			t.Errorf("AtLeast(%q, %q) = %v, want %v", test.v, test.m, got, test.want)
 		}

version/export_test.go

@@ -0,0 +1,15 @@
+// Copyright (c) 2022 Tailscale Inc & AUTHORS All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package version
+
+var (
+	ExportParse          = parse
+	ExportFindModuleInfo = findModuleInfo
+	ExportCmdName        = cmdName
+)
+
+type (
+	ExportParsed = parsed
+)

version/modinfo_test.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package version
+package version_test
 
 import (
 	"flag"
@@ -11,6 +11,13 @@ import (
 	"runtime"
 	"strings"
 	"testing"
+
+	"tailscale.com/version"
+)
+
+var (
+	findModuleInfo = version.ExportFindModuleInfo
+	cmdName        = version.ExportCmdName
 )
 
 func TestFindModuleInfo(t *testing.T) {

version/version_test.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-package version
+package version_test
 
 import (
 	"bytes"