libgo: update to Go1.16beta1 release

This does not yet include support for the //go:embed directive added
in this release.

	* Makefile.am (check-runtime): Don't create check-runtime-dir.
	(mostlyclean-local): Don't remove check-runtime-dir.
	(check-go-tool, check-vet): Copy in go.mod and modules.txt.
	(check-cgo-test, check-carchive-test): Add go.mod file.
	* Makefile.in: Regenerate.

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/280172

11 files changed, 70 insertions, 26 deletions

diff --git a/libgo/go/mime/encodedword_test.go b/libgo/go/mime/encodedword_test.go
index 6c54e50..2a98794 100644
--- a/libgo/go/mime/encodedword_test.go
+++ b/libgo/go/mime/encodedword_test.go
@@ -7,7 +7,6 @@ package mime
 import (
 	"errors"
 	"io"
-	"io/ioutil"
 	"strings"
 	"testing"
 )
@@ -182,7 +181,7 @@ func TestCharsetDecoder(t *testing.T) {
 				if charset != test.charsets[i] {
 					t.Errorf("DecodeHeader(%q), got charset %q, want %q", test.src, charset, test.charsets[i])
 				}
-				content, err := ioutil.ReadAll(input)
+				content, err := io.ReadAll(input)
 				if err != nil {
 					t.Errorf("DecodeHeader(%q), error in reader: %v", test.src, err)
 				}
diff --git a/libgo/go/mime/example_test.go b/libgo/go/mime/example_test.go
index c7d13cd..8a96873 100644
--- a/libgo/go/mime/example_test.go
+++ b/libgo/go/mime/example_test.go
@@ -8,7 +8,6 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"mime"
 )
 
@@ -38,7 +37,7 @@ func ExampleWordDecoder_Decode() {
 			// Fake character set for example.
 			// Real use would integrate with packages such
 			// as code.google.com/p/go-charset
-			content, err := ioutil.ReadAll(input)
+			content, err := io.ReadAll(input)
 			if err != nil {
 				return nil, err
 			}
@@ -77,7 +76,7 @@ func ExampleWordDecoder_DecodeHeader() {
 			// Fake character set for example.
 			// Real use would integrate with packages such
 			// as code.google.com/p/go-charset
-			content, err := ioutil.ReadAll(input)
+			content, err := io.ReadAll(input)
 			if err != nil {
 				return nil, err
 			}
@@ -96,3 +95,29 @@ func ExampleWordDecoder_DecodeHeader() {
 	// ¡Hola, señor!
 	// HELLO WORLD!
 }
+
+func ExampleFormatMediaType() {
+	mediatype := "text/html"
+	params := map[string]string{
+		"charset": "utf-8",
+	}
+
+	result := mime.FormatMediaType(mediatype, params)
+
+	fmt.Println("result:", result)
+	// Output:
+	// result: text/html; charset=utf-8
+}
+
+func ExampleParseMediaType() {
+	mediatype, params, err := mime.ParseMediaType("text/html; charset=utf-8")
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println("type:", mediatype)
+	fmt.Println("charset:", params["charset"])
+	// Output:
+	// type: text/html
+	// charset: utf-8
+}
diff --git a/libgo/go/mime/multipart/formdata.go b/libgo/go/mime/multipart/formdata.go
index 832d0ad..fca5f9e 100644
--- a/libgo/go/mime/multipart/formdata.go
+++ b/libgo/go/mime/multipart/formdata.go
@@ -8,7 +8,7 @@ import (
 	"bytes"
 	"errors"
 	"io"
-	"io/ioutil"
+	"math"
 	"net/textproto"
 	"os"
 )
@@ -41,6 +41,13 @@ func (r *Reader) readForm(maxMemory int64) (_ *Form, err error) {
 
 	// Reserve an additional 10 MB for non-file parts.
 	maxValueBytes := maxMemory + int64(10<<20)
+	if maxValueBytes <= 0 {
+		if maxMemory < 0 {
+			maxValueBytes = 0
+		} else {
+			maxValueBytes = math.MaxInt64
+		}
+	}
 	for {
 		p, err := r.NextPart()
 		if err == io.EOF {
@@ -83,7 +90,7 @@ func (r *Reader) readForm(maxMemory int64) (_ *Form, err error) {
 		}
 		if n > maxMemory {
 			// too big, write to disk and flush buffer
-			file, err := ioutil.TempFile("", "multipart-")
+			file, err := os.CreateTemp("", "multipart-")
 			if err != nil {
 				return nil, err
 			}
diff --git a/libgo/go/mime/multipart/formdata_test.go b/libgo/go/mime/multipart/formdata_test.go
index 7d756c8..e3a3a3e 100644
--- a/libgo/go/mime/multipart/formdata_test.go
+++ b/libgo/go/mime/multipart/formdata_test.go
@@ -7,6 +7,7 @@ package multipart
 import (
 	"bytes"
 	"io"
+	"math"
 	"os"
 	"strings"
 	"testing"
@@ -52,6 +53,19 @@ func TestReadFormWithNamelessFile(t *testing.T) {
 	}
 }
 
+// Issue 40430: Handle ReadForm(math.MaxInt64)
+func TestReadFormMaxMemoryOverflow(t *testing.T) {
+	b := strings.NewReader(strings.ReplaceAll(messageWithTextContentType, "\n", "\r\n"))
+	r := NewReader(b, boundary)
+	f, err := r.ReadForm(math.MaxInt64)
+	if err != nil {
+		t.Fatalf("ReadForm(MaxInt64): %v", err)
+	}
+	if f == nil {
+		t.Fatal("ReadForm(MaxInt64): missing form")
+	}
+}
+
 func TestReadFormWithTextContentType(t *testing.T) {
 	// From https://github.com/golang/go/issues/24041
 	b := strings.NewReader(strings.ReplaceAll(messageWithTextContentType, "\n", "\r\n"))
diff --git a/libgo/go/mime/multipart/multipart.go b/libgo/go/mime/multipart/multipart.go
index 1750300..cb8bf393 100644
--- a/libgo/go/mime/multipart/multipart.go
+++ b/libgo/go/mime/multipart/multipart.go
@@ -17,7 +17,6 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"mime"
 	"mime/quotedprintable"
 	"net/textproto"
@@ -278,7 +277,7 @@ func matchAfterPrefix(buf, prefix []byte, readErr error) int {
 }
 
 func (p *Part) Close() error {
-	io.Copy(ioutil.Discard, p)
+	io.Copy(io.Discard, p)
 	return nil
 }
 
diff --git a/libgo/go/mime/multipart/multipart_test.go b/libgo/go/mime/multipart/multipart_test.go
index b60c54a..741d230 100644
--- a/libgo/go/mime/multipart/multipart_test.go
+++ b/libgo/go/mime/multipart/multipart_test.go
@@ -9,7 +9,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/textproto"
 	"os"
 	"reflect"
@@ -307,7 +306,7 @@ Oh no, premature EOF!
 	if err != nil {
 		t.Fatalf("didn't get a part")
 	}
-	_, err = io.Copy(ioutil.Discard, part)
+	_, err = io.Copy(io.Discard, part)
 	if err != io.ErrUnexpectedEOF {
 		t.Fatalf("expected error io.ErrUnexpectedEOF; got %v", err)
 	}
@@ -372,7 +371,7 @@ Body 2
 		if !reflect.DeepEqual(part.Header, hdr) {
 			t.Errorf("Part %d: part.Header = %v, want %v", i, part.Header, hdr)
 		}
-		data, err := ioutil.ReadAll(part)
+		data, err := io.ReadAll(part)
 		expectEq(t, body, string(data), fmt.Sprintf("Part %d body", i))
 		if err != nil {
 			t.Fatalf("Part %d: ReadAll failed: %v", i, err)
@@ -530,14 +529,14 @@ func TestNested(t *testing.T) {
 	if err != nil {
 		t.Fatalf("reading text/plain part: %v", err)
 	}
-	if b, err := ioutil.ReadAll(p); string(b) != "*body*\r\n" || err != nil {
+	if b, err := io.ReadAll(p); string(b) != "*body*\r\n" || err != nil {
 		t.Fatalf("reading text/plain part: got %q, %v", b, err)
 	}
 	p, err = mr2.NextPart()
 	if err != nil {
 		t.Fatalf("reading text/html part: %v", err)
 	}
-	if b, err := ioutil.ReadAll(p); string(b) != "<b>body</b>\r\n" || err != nil {
+	if b, err := io.ReadAll(p); string(b) != "<b>body</b>\r\n" || err != nil {
 		t.Fatalf("reading text/html part: got %q, %v", b, err)
 	}
 
@@ -850,7 +849,7 @@ Cases:
 				t.Errorf("in test %q, NextPart: %v", tt.name, err)
 				continue Cases
 			}
-			pbody, err := ioutil.ReadAll(p)
+			pbody, err := io.ReadAll(p)
 			if err != nil {
 				t.Errorf("in test %q, error reading part: %v", tt.name, err)
 				continue Cases
@@ -882,7 +881,7 @@ func partsFromReader(r *Reader) ([]headerBody, error) {
 		if err != nil {
 			return nil, fmt.Errorf("NextPart: %v", err)
 		}
-		pbody, err := ioutil.ReadAll(p)
+		pbody, err := io.ReadAll(p)
 		if err != nil {
 			return nil, fmt.Errorf("error reading part: %v", err)
 		}
diff --git a/libgo/go/mime/multipart/writer_test.go b/libgo/go/mime/multipart/writer_test.go
index b89b093..cfc0f09 100644
--- a/libgo/go/mime/multipart/writer_test.go
+++ b/libgo/go/mime/multipart/writer_test.go
@@ -6,7 +6,7 @@ package multipart
 
 import (
 	"bytes"
-	"io/ioutil"
+	"io"
 	"mime"
 	"net/textproto"
 	"strings"
@@ -51,7 +51,7 @@ func TestWriter(t *testing.T) {
 	if g, e := part.FormName(), "myfile"; g != e {
 		t.Errorf("part 1: want form name %q, got %q", e, g)
 	}
-	slurp, err := ioutil.ReadAll(part)
+	slurp, err := io.ReadAll(part)
 	if err != nil {
 		t.Fatalf("part 1: ReadAll: %v", err)
 	}
@@ -66,7 +66,7 @@ func TestWriter(t *testing.T) {
 	if g, e := part.FormName(), "key"; g != e {
 		t.Errorf("part 2: want form name %q, got %q", e, g)
 	}
-	slurp, err = ioutil.ReadAll(part)
+	slurp, err = io.ReadAll(part)
 	if err != nil {
 		t.Fatalf("part 2: ReadAll: %v", err)
 	}
@@ -134,7 +134,7 @@ func TestWriterBoundaryGoroutines(t *testing.T) {
 	// different goroutines. This was previously broken by
 	// https://codereview.appspot.com/95760043/ and reverted in
 	// https://codereview.appspot.com/117600043/
-	w := NewWriter(ioutil.Discard)
+	w := NewWriter(io.Discard)
 	done := make(chan int)
 	go func() {
 		w.CreateFormField("foo")
diff --git a/libgo/go/mime/quotedprintable/example_test.go b/libgo/go/mime/quotedprintable/example_test.go
index 5a9ab45..e5a479a 100644
--- a/libgo/go/mime/quotedprintable/example_test.go
+++ b/libgo/go/mime/quotedprintable/example_test.go
@@ -6,7 +6,7 @@ package quotedprintable_test
 
 import (
 	"fmt"
-	"io/ioutil"
+	"io"
 	"mime/quotedprintable"
 	"os"
 	"strings"
@@ -18,7 +18,7 @@ func ExampleNewReader() {
 		`invalid escape: <b style="font-size: 200%">hello</b>`,
 		"Hello, Gophers! This symbol will be unescaped: =3D and this will be written in =\r\none line.",
 	} {
-		b, err := ioutil.ReadAll(quotedprintable.NewReader(strings.NewReader(s)))
+		b, err := io.ReadAll(quotedprintable.NewReader(strings.NewReader(s)))
 		fmt.Printf("%s %v\n", b, err)
 	}
 	// Output:
diff --git a/libgo/go/mime/quotedprintable/writer_test.go b/libgo/go/mime/quotedprintable/writer_test.go
index d494c1e..42de0f3 100644
--- a/libgo/go/mime/quotedprintable/writer_test.go
+++ b/libgo/go/mime/quotedprintable/writer_test.go
@@ -6,7 +6,7 @@ package quotedprintable
 
 import (
 	"bytes"
-	"io/ioutil"
+	"io"
 	"strings"
 	"testing"
 )
@@ -128,7 +128,7 @@ func TestRoundTrip(t *testing.T) {
 	}
 
 	r := NewReader(buf)
-	gotBytes, err := ioutil.ReadAll(r)
+	gotBytes, err := io.ReadAll(r)
 	if err != nil {
 		t.Fatalf("Error while reading from Reader: %v", err)
 	}
@@ -151,7 +151,7 @@ var testMsg = []byte("Quoted-Printable (QP) est un format d'encodage de données
 
 func BenchmarkWriter(b *testing.B) {
 	for i := 0; i < b.N; i++ {
-		w := NewWriter(ioutil.Discard)
+		w := NewWriter(io.Discard)
 		w.Write(testMsg)
 		w.Close()
 	}
diff --git a/libgo/go/mime/type_unix.go b/libgo/go/mime/type_unix.go
index 5db1b68..6ac056c 100644
--- a/libgo/go/mime/type_unix.go
+++ b/libgo/go/mime/type_unix.go
@@ -20,6 +20,7 @@ var typeFiles = []string{
 	"/etc/mime.types",
 	"/etc/apache2/mime.types",
 	"/etc/apache/mime.types",
+	"/etc/httpd/conf/mime.types",
 }
 
 func loadMimeFile(filename string) {
diff --git a/libgo/go/mime/type_windows.go b/libgo/go/mime/type_windows.go
index 97b9aeb..cee9c9d 100644
--- a/libgo/go/mime/type_windows.go
+++ b/libgo/go/mime/type_windows.go
@@ -13,7 +13,7 @@ func init() {
 }
 
 func initMimeWindows() {
-	names, err := registry.CLASSES_ROOT.ReadSubKeyNames(-1)
+	names, err := registry.CLASSES_ROOT.ReadSubKeyNames()
 	if err != nil {
 		return
 	}