Update dependencies

vendor/golang.org/x/net/route/sys.go

@@ -0,0 +1,45 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build darwin || dragonfly || freebsd || netbsd || openbsd
+
+package route
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+var (
+	nativeEndian binaryByteOrder
+	kernelAlign  int
+	rtmVersion   byte
+	wireFormats  map[int]*wireFormat
+)
+
+func init() {
+	i := uint32(1)
+	b := (*[4]byte)(unsafe.Pointer(&i))
+	if b[0] == 1 {
+		nativeEndian = littleEndian
+	} else {
+		nativeEndian = bigEndian
+	}
+	// might get overridden in probeRoutingStack
+	rtmVersion = syscall.RTM_VERSION
+	kernelAlign, wireFormats = probeRoutingStack()
+}
+
+func roundup(l int) int {
+	if l == 0 {
+		return kernelAlign
+	}
+	return (l + kernelAlign - 1) &^ (kernelAlign - 1)
+}
+
+type wireFormat struct {
+	extOff  int // offset of header extension
+	bodyOff int // offset of message body
+	parse   func(RIBType, []byte) (Message, error)
+}