vendor folder bump.

vendor/golang.org/x/net/ipv4/payload_nocmsg.go

@@ -1,23 +1,20 @@
-// Copyright 2012 The Go Authors.  All rights reserved.
+// Copyright 2012 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.
 
-// +build plan9 solaris windows
+// +build js nacl plan9 windows
 
 package ipv4
 
-import (
-	"net"
-	"syscall"
-)
+import "net"
 
 // ReadFrom reads a payload of the received IPv4 datagram, from the
-// endpoint c, copying the payload into b.  It returns the number of
+// endpoint c, copying the payload into b. It returns the number of
 // bytes copied into b, the control message cm and the source address
 // src of the received datagram.
 func (c *payloadHandler) ReadFrom(b []byte) (n int, cm *ControlMessage, src net.Addr, err error) {
 	if !c.ok() {
-		return 0, nil, nil, syscall.EINVAL
+		return 0, nil, nil, errInvalidConn
 	}
 	if n, src, err = c.PacketConn.ReadFrom(b); err != nil {
 		return 0, nil, nil, err
@@ -26,14 +23,14 @@ func (c *payloadHandler) ReadFrom(b []byte) (n int, cm *ControlMessage, src net.
 }
 
 // WriteTo writes a payload of the IPv4 datagram, to the destination
-// address dst through the endpoint c, copying the payload from b.  It
-// returns the number of bytes written.  The control message cm allows
+// address dst through the endpoint c, copying the payload from b. It
+// returns the number of bytes written. The control message cm allows
 // the datagram path and the outgoing interface to be specified.
-// Currently only Darwin and Linux support this.  The cm may be nil if
+// Currently only Darwin and Linux support this. The cm may be nil if
 // control of the outgoing datagram is not required.
 func (c *payloadHandler) WriteTo(b []byte, cm *ControlMessage, dst net.Addr) (n int, err error) {
 	if !c.ok() {
-		return 0, syscall.EINVAL
+		return 0, errInvalidConn
 	}
 	if dst == nil {
 		return 0, errMissingAddress