Update dependencies

vendor/tailscale.com/net/netaddr/netaddr.go

@@ -0,0 +1,49 @@
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+
+// Package netaddr is a transitional package while we finish migrating from inet.af/netaddr
+// to Go 1.18's net/netip.
+//
+// TODO(bradfitz): delete this package eventually. Tracking bug is
+// https://github.com/tailscale/tailscale/issues/5162
+package netaddr
+
+import (
+	"net"
+	"net/netip"
+)
+
+// IPv4 returns the IP of the IPv4 address a.b.c.d.
+func IPv4(a, b, c, d uint8) netip.Addr {
+	return netip.AddrFrom4([4]byte{a, b, c, d})
+}
+
+// Unmap returns the provided AddrPort with its Addr IP component Unmap'ed.
+//
+// See https://github.com/golang/go/issues/53607#issuecomment-1203466984
+func Unmap(ap netip.AddrPort) netip.AddrPort {
+	return netip.AddrPortFrom(ap.Addr().Unmap(), ap.Port())
+}
+
+// FromStdIPNet returns an IPPrefix from the standard library's IPNet type.
+// If std is invalid, ok is false.
+func FromStdIPNet(std *net.IPNet) (prefix netip.Prefix, ok bool) {
+	ip, ok := netip.AddrFromSlice(std.IP)
+	if !ok {
+		return netip.Prefix{}, false
+	}
+	ip = ip.Unmap()
+
+	if l := len(std.Mask); l != net.IPv4len && l != net.IPv6len {
+		// Invalid mask.
+		return netip.Prefix{}, false
+	}
+
+	ones, bits := std.Mask.Size()
+	if ones == 0 && bits == 0 {
+		// IPPrefix does not support non-contiguous masks.
+		return netip.Prefix{}, false
+	}
+
+	return netip.PrefixFrom(ip, ones), true
+}