vendor/golang_org/x/net/idna: update from upstream

The only file that really changed is
x/net/idna (upstream 8253218a).

See CL 73730: avoid memory leak in validation codes

The rest is just a small change in the
generation line at the top.

Change-Id: I62c5172f77f63d919c41d11c6db0a9517bc2a221
Reviewed-on: https://go-review.googlesource.com/74953Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/vendor/golang_org/x/net/idna/idna.go

-// Code generated by running "go run gen.go -core" in golang.org/x/text. DO NOT EDIT.
+// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
 // Copyright 2016 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
@@ -309,7 +309,7 @@ func (p *Profile) process(s string, toASCII bool) (string, error) {
 		for ; len(s) > 0 && s[0] == '.'; s = s[1:] {
 		}
 	}
-	// TODO: allow for a quick check the tables data.
+	// TODO: allow for a quick check of the tables data.
 	// It seems like we should only create this error on ToASCII, but the
 	// UTS 46 conformance tests suggests we should always check this.
 	if err == nil && p.verifyDNSLength && s == "" {
@@ -405,6 +405,9 @@ func validateRegistration(p *Profile, s string) (idem string, bidi bool, err err
 	}
 	for i := 0; i < len(s); {
 		v, sz := trie.lookupString(s[i:])
+		if sz == 0 {
+			return s, bidi, runeError(utf8.RuneError)
+		}
 		bidi = bidi || info(v).isBidi(s[i:])
 		// Copy bytes not copied so far.
 		switch p.simplify(info(v).category()) {
@@ -446,6 +449,15 @@ func validateAndMap(p *Profile, s string) (vm string, bidi bool, err error) {
 	var combinedInfoBits info
 	for i := 0; i < len(s); {
 		v, sz := trie.lookupString(s[i:])
+		if sz == 0 {
+			b = append(b, s[k:i]...)
+			b = append(b, "\ufffd"...)
+			k = len(s)
+			if err == nil {
+				err = runeError(utf8.RuneError)
+			}
+			break
+		}
 		combinedInfoBits |= info(v)
 		bidi = bidi || info(v).isBidi(s[i:])
 		start := i
@@ -584,6 +596,9 @@ func validateFromPunycode(p *Profile, s string) error {
 	// loop.
 	for i := 0; i < len(s); {
 		v, sz := trie.lookupString(s[i:])
+		if sz == 0 {
+			return runeError(utf8.RuneError)
+		}
 		if c := p.simplify(info(v).category()); c != valid && c != deviation {
 			return &labelError{s, "V6"}
 		}

src/vendor/golang_org/x/net/idna/punycode.go

-// Code generated by running "go run gen.go -core" in golang.org/x/text. DO NOT EDIT.
+// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
 // Copyright 2016 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style

src/vendor/golang_org/x/net/idna/tables.go

-// Code generated by running "go run gen.go -core" in golang.org/x/text. DO NOT EDIT.
+// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
 // Code generated by running "go generate" in golang_org/x/text. DO NOT EDIT.
 

src/vendor/golang_org/x/net/idna/trie.go

-// Code generated by running "go run gen.go -core" in golang.org/x/text. DO NOT EDIT.
+// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
 // Copyright 2016 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style

src/vendor/golang_org/x/net/idna/trieval.go

-// Code generated by running "go run gen.go -core" in golang.org/x/text. DO NOT EDIT.
+// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
 // Code generated by running "go generate" in golang_org/x/text. DO NOT EDIT.
 

src/vendor/golang_org/x/text/secure/bidirule/bidirule.go

-// Code generated by running "go run gen.go -core" in golang.org/x/text. DO NOT EDIT.
+// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
 // Copyright 2016 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style

src/vendor/golang_org/x/text/secure/doc.go

-// Code generated by running "go run gen.go -core" in golang.org/x/text. DO NOT EDIT.
+// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
 // Copyright 2016 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style

src/vendor/golang_org/x/text/transform/transform.go

-// Code generated by running "go run gen.go -core" in golang.org/x/text. DO NOT EDIT.
+// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
 // Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style

src/vendor/golang_org/x/text/unicode/bidi/bidi.go

-// Code generated by running "go run gen.go -core" in golang.org/x/text. DO NOT EDIT.
+// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
 // Copyright 2015 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style

src/vendor/golang_org/x/text/unicode/bidi/bracket.go

-// Code generated by running "go run gen.go -core" in golang.org/x/text. DO NOT EDIT.
+// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
 // Copyright 2015 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style

src/vendor/golang_org/x/text/unicode/bidi/core.go

-// Code generated by running "go run gen.go -core" in golang.org/x/text. DO NOT EDIT.
+// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
 // Copyright 2015 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style

src/vendor/golang_org/x/text/unicode/bidi/prop.go

-// Code generated by running "go run gen.go -core" in golang.org/x/text. DO NOT EDIT.
+// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
 // Copyright 2016 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style

src/vendor/golang_org/x/text/unicode/bidi/tables.go

-// Code generated by running "go run gen.go -core" in golang.org/x/text. DO NOT EDIT.
+// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
 // Code generated by running "go generate" in golang_org/x/text. DO NOT EDIT.
 

src/vendor/golang_org/x/text/unicode/bidi/trieval.go

-// Code generated by running "go run gen.go -core" in golang.org/x/text. DO NOT EDIT.
+// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
 // Code generated by running "go generate" in golang_org/x/text. DO NOT EDIT.
 

src/vendor/golang_org/x/text/unicode/doc.go

-// Code generated by running "go run gen.go -core" in golang.org/x/text. DO NOT EDIT.
+// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
 // Copyright 2015 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style

src/vendor/golang_org/x/text/unicode/norm/composition.go

-// Code generated by running "go run gen.go -core" in golang.org/x/text. DO NOT EDIT.
+// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
 // Copyright 2011 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style

src/vendor/golang_org/x/text/unicode/norm/forminfo.go

-// Code generated by running "go run gen.go -core" in golang.org/x/text. DO NOT EDIT.
+// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
 // Copyright 2011 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style

src/vendor/golang_org/x/text/unicode/norm/input.go

-// Code generated by running "go run gen.go -core" in golang.org/x/text. DO NOT EDIT.
+// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
 // Copyright 2011 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style

src/vendor/golang_org/x/text/unicode/norm/iter.go

-// Code generated by running "go run gen.go -core" in golang.org/x/text. DO NOT EDIT.
+// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
 // Copyright 2011 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style

src/vendor/golang_org/x/text/unicode/norm/normalize.go

-// Code generated by running "go run gen.go -core" in golang.org/x/text. DO NOT EDIT.
+// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
 // Copyright 2011 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style

src/vendor/golang_org/x/text/unicode/norm/readwriter.go

-// Code generated by running "go run gen.go -core" in golang.org/x/text. DO NOT EDIT.
+// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
 // Copyright 2011 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style

src/vendor/golang_org/x/text/unicode/norm/tables.go

-// Code generated by running "go run gen.go -core" in golang.org/x/text. DO NOT EDIT.
+// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
 // Code generated by running "go generate" in golang_org/x/text. DO NOT EDIT.
 

src/vendor/golang_org/x/text/unicode/norm/transform.go

-// Code generated by running "go run gen.go -core" in golang.org/x/text. DO NOT EDIT.
+// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
 // Copyright 2013 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style

src/vendor/golang_org/x/text/unicode/norm/trie.go

-// Code generated by running "go run gen.go -core" in golang.org/x/text. DO NOT EDIT.
+// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
 // Copyright 2011 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style