all: move internal/x to vendor/golang.org/x and revendor using 'go mod vendor'

This also updates the vendored-in versions of several packages: 'go
mod vendor' selects a consistent version of each module, but we had
previously vendored an ad-hoc selection of packages.

Notably, x/crypto/hkdf was previously vendored in at a much newer
commit than the rest of x/crypto. Bringing the rest of x/crypto up to
that commit introduced an import of golang.org/x/sys/cpu, which broke
the js/wasm build, requiring an upgrade of x/sys to pick up CL 165749.

Updates #30228
Updates #30241
Updates #25822

Change-Id: I5b3dbc232b7e6a048a158cbd8d36137af1efb711
Reviewed-on: https://go-review.googlesource.com/c/go/+/164623
Reviewed-by: Filippo Valsorda <filippo@golang.org>

1 files changed, 0 insertions, 154 deletions

diff --git a/src/internal/x/crypto/cryptobyte/example_test.go b/src/internal/x/crypto/cryptobyte/example_test.go
deleted file mode 100644
index 5b50025318..0000000000
--- a/src/internal/x/crypto/cryptobyte/example_test.go
+++ /dev/null
@@ -1,154 +0,0 @@
-// Copyright 2017 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.
-
-package cryptobyte_test
-
-import (
-	"errors"
-	"fmt"
-
-	"internal/x/crypto/cryptobyte"
-	"internal/x/crypto/cryptobyte/asn1"
-)
-
-func ExampleString_lengthPrefixed() {
-	// This is an example of parsing length-prefixed data (as found in, for
-	// example, TLS). Imagine a 16-bit prefixed series of 8-bit prefixed
-	// strings.
-
-	input := cryptobyte.String([]byte{0, 12, 5, 'h', 'e', 'l', 'l', 'o', 5, 'w', 'o', 'r', 'l', 'd'})
-	var result []string
-
-	var values cryptobyte.String
-	if !input.ReadUint16LengthPrefixed(&values) ||
-		!input.Empty() {
-		panic("bad format")
-	}
-
-	for !values.Empty() {
-		var value cryptobyte.String
-		if !values.ReadUint8LengthPrefixed(&value) {
-			panic("bad format")
-		}
-
-		result = append(result, string(value))
-	}
-
-	// Output: []string{"hello", "world"}
-	fmt.Printf("%#v\n", result)
-}
-
-func ExampleString_aSN1() {
-	// This is an example of parsing ASN.1 data that looks like:
-	//    Foo ::= SEQUENCE {
-	//      version [6] INTEGER DEFAULT 0
-	//      data OCTET STRING
-	//    }
-
-	input := cryptobyte.String([]byte{0x30, 12, 0xa6, 3, 2, 1, 2, 4, 5, 'h', 'e', 'l', 'l', 'o'})
-
-	var (
-		version                   int64
-		data, inner, versionBytes cryptobyte.String
-		haveVersion               bool
-	)
-	if !input.ReadASN1(&inner, asn1.SEQUENCE) ||
-		!input.Empty() ||
-		!inner.ReadOptionalASN1(&versionBytes, &haveVersion, asn1.Tag(6).Constructed().ContextSpecific()) ||
-		(haveVersion && !versionBytes.ReadASN1Integer(&version)) ||
-		(haveVersion && !versionBytes.Empty()) ||
-		!inner.ReadASN1(&data, asn1.OCTET_STRING) ||
-		!inner.Empty() {
-		panic("bad format")
-	}
-
-	// Output: haveVersion: true, version: 2, data: hello
-	fmt.Printf("haveVersion: %t, version: %d, data: %s\n", haveVersion, version, string(data))
-}
-
-func ExampleBuilder_aSN1() {
-	// This is an example of building ASN.1 data that looks like:
-	//    Foo ::= SEQUENCE {
-	//      version [6] INTEGER DEFAULT 0
-	//      data OCTET STRING
-	//    }
-
-	version := int64(2)
-	data := []byte("hello")
-	const defaultVersion = 0
-
-	var b cryptobyte.Builder
-	b.AddASN1(asn1.SEQUENCE, func(b *cryptobyte.Builder) {
-		if version != defaultVersion {
-			b.AddASN1(asn1.Tag(6).Constructed().ContextSpecific(), func(b *cryptobyte.Builder) {
-				b.AddASN1Int64(version)
-			})
-		}
-		b.AddASN1OctetString(data)
-	})
-
-	result, err := b.Bytes()
-	if err != nil {
-		panic(err)
-	}
-
-	// Output: 300ca603020102040568656c6c6f
-	fmt.Printf("%x\n", result)
-}
-
-func ExampleBuilder_lengthPrefixed() {
-	// This is an example of building length-prefixed data (as found in,
-	// for example, TLS). Imagine a 16-bit prefixed series of 8-bit
-	// prefixed strings.
-	input := []string{"hello", "world"}
-
-	var b cryptobyte.Builder
-	b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) {
-		for _, value := range input {
-			b.AddUint8LengthPrefixed(func(b *cryptobyte.Builder) {
-				b.AddBytes([]byte(value))
-			})
-		}
-	})
-
-	result, err := b.Bytes()
-	if err != nil {
-		panic(err)
-	}
-
-	// Output: 000c0568656c6c6f05776f726c64
-	fmt.Printf("%x\n", result)
-}
-
-func ExampleBuilder_lengthPrefixOverflow() {
-	// Writing more data that can be expressed by the length prefix results
-	// in an error from Bytes().
-
-	tooLarge := make([]byte, 256)
-
-	var b cryptobyte.Builder
-	b.AddUint8LengthPrefixed(func(b *cryptobyte.Builder) {
-		b.AddBytes(tooLarge)
-	})
-
-	result, err := b.Bytes()
-	fmt.Printf("len=%d err=%s\n", len(result), err)
-
-	// Output: len=0 err=cryptobyte: pending child length 256 exceeds 1-byte length prefix
-}
-
-func ExampleBuilderContinuation_errorHandling() {
-	var b cryptobyte.Builder
-	// Continuations that panic with a BuildError will cause Bytes to
-	// return the inner error.
-	b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) {
-		b.AddUint32(0)
-		panic(cryptobyte.BuildError{Err: errors.New("example error")})
-	})
-
-	result, err := b.Bytes()
-	fmt.Printf("len=%d err=%s\n", len(result), err)
-
-	// Output: len=0 err=example error
-}