Update

vendor/tailscale.com/net/tstun/netstack_enabled.go

@@ -0,0 +1,22 @@
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+
+//go:build !ts_omit_netstack
+
+package tstun
+
+import (
+	"gvisor.dev/gvisor/pkg/tcpip/stack"
+)
+
+type (
+	netstack_PacketBuffer = stack.PacketBuffer
+	netstack_GSO          = stack.GSO
+)
+
+const (
+	netstack_GSONone   = stack.GSONone
+	netstack_GSOTCPv4  = stack.GSOTCPv4
+	netstack_GSOTCPv6  = stack.GSOTCPv6
+	netstack_GSOGvisor = stack.GSOGvisor
+)