Update dependencies

vendor/tailscale.com/control/controlhttp/controlhttpcommon/controlhttpcommon.go

@@ -0,0 +1,15 @@
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+
+// Package controlhttpcommon contains common constants for used
+// by the controlhttp client and controlhttpserver packages.
+package controlhttpcommon
+
+// UpgradeHeader is the value of the Upgrade HTTP header used to
+// indicate the Tailscale control protocol.
+const UpgradeHeaderValue = "tailscale-control-protocol"
+
+// handshakeHeaderName is the HTTP request header that can
+// optionally contain base64-encoded initial handshake
+// payload, to save an RTT.
+const HandshakeHeaderName = "X-Tailscale-Handshake"