Fixes #4705.

Note that libjpeg will print a warning to stderr if there are many
extraneous bytes, but can be silent if the extraneous bytes can fit
into its int32 bit-buffer for Huffman decoding. I'm guessing that
this is why whatever encoder that produced the image filed for issue
4705 did not realize that they are, strictly speaking, generating an
invalid JPEG. That issue's attached image has two extraneous bytes.

For example, piping the program below into libjpeg's djpeg program
will print an "18 extraneous bytes" warning, even though N == 20.

$ cat main.go
package main

import (
        "bytes"
        "image"
        "image/color"
        "image/jpeg"
        "os"
)

const N = 20

func main() {
        // Encode a 1x1 red image.
        m := image.NewRGBA(image.Rect(0, 0, 1, 1))
        m.Set(0, 0, color.RGBA{255, 0, 0, 255})
        buf := new(bytes.Buffer)
        jpeg.Encode(buf, m, nil)
        b := buf.Bytes()
        // Strip the final "\xff\xd9" EOI marker.
        b = b[:len(b)-2]
        // Append N dummy 0x80 bytes to the SOS data.
        for i := 0; i < N; i++ {
                b = append(b, 0x80)
        }
        // Put back the "\xff\xd9" EOI marker.
        b = append(b, 0xff, 0xd9)
        os.Stdout.Write(b)
}
$ go run main.go | djpeg /dev/stdin > /tmp/foo.pnm
Corrupt JPEG data: 18 extraneous bytes before marker 0xd9

The resultant /tmp/foo.pnm is a perfectly good 1x1 red image.

R=r
CC=golang-dev
https://golang.org/cl/7750043

R=golang-dev, bradfitz, dave, rsc
CC=golang-dev
https://golang.org/cl/7547044

With the global redefinition of runtime·open by CL 7543043,
we need to provide a third argument and remove the cast
to the string.

Fixes build on 386 version of Plan 9.

R=khr, rsc, rminnich, ality
CC=golang-dev
https://golang.org/cl/7644047

Needed by TestResolveIPAddr. This makes us pass tests
again.

R=rsc, rminnich, ality, bradfitz
CC=golang-dev
https://golang.org/cl/7737043

Many thanks to Elias Naur for finding this with Valgrind on Linux.
Perhaps this is what is breaking the windows/amd64 builder.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7595044

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7663045

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/6727046

R=golang-dev, dave, iant
CC=golang-dev
https://golang.org/cl/7765043

The old description was misleading and inaccurate.

Fixes #4774.

R=iant, rsc, gri
CC=golang-dev
https://golang.org/cl/7761044

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7762046

See also https://golang.org/cl/7656044

R=golang-dev, gri, rsc
CC=golang-dev
https://golang.org/cl/7625048

Fixes #5033.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7764044

The parameter list layout function was incorrectly computing the
end of the previous line in cases where a parameter type spanned
multiple lines. As a result, an extra (valid, but not needed)
comma was introduced before the paremeter list's closing parenthesis.

Fixes #4533.

R=rsc
CC=golang-dev
https://golang.org/cl/7674044

This was a bug that didn't manifest itself before CL 7674044;
but with that CL and without this fix, the go/doc tests fail.
(The bug fixed by 7674044 and the bug fixed here cancelled
each other out w/ respect to the go/doc tests).

R=rsc
CC=golang-dev
https://golang.org/cl/7628045

Introduce pollDesc struct, to split netFD struct into fd-related
and poller-related parts.

R=golang-dev, bradfitz, iant
CC=golang-dev
https://golang.org/cl/7762044

Fixes #5035.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7519045

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7593045

It didn't work properly according to the Go memory model.
Fixes #5023.

R=golang-dev, dvyukov, adg
CC=golang-dev
https://golang.org/cl/7698045

Uses AES hardware instructions on 386/amd64 to implement
a fast hash function.  Incorporates a random key to
thwart hash collision DOS attacks.
Depends on CL#7548043 for new assembly instructions.

Update #3885
Helps some by making hashing faster.  Go time drops from
0.65s to 0.51s.

R=rsc, r, bradfitz, remyoudompheng, khr, dsymonds, minux.ma, elias.naur
CC=golang-dev
https://golang.org/cl/7543043

R=golang-dev
CC=golang-dev
https://golang.org/cl/7760043

This is a part of the bigger change that moves network poller into runtime:
https://golang.org/cl/7326051/

R=golang-dev, bradfitz, mikioh.mikioh, rsc
CC=golang-dev
https://golang.org/cl/7448048

If two fields have the same name but different explicit name spaces,
treat as non-conflicting. This allows parsing common XML formats
that have ns1:tag and ns2:tag in the same XML element.
Fixes #4691.

Allow setting the default name space for unadorned tags, by
writing to Decoder.DefaultSpace. This allows turned the job of
parsing common XML formats that have tag and ns2:tag in the
same XML element into the first case by setting DefaultSpace="ns1".
Fixes #3703.

Use name space attributes when decoding.
Attach name space to attributes when encoding.
Could be done with fewer annotations, but semantically correct as is.
Fixes #3526.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7227056

Fixes #5006.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/7691045

Generated by addca.

R=gobot
CC=golang-dev
https://golang.org/cl/7526046

The issue was that scvg is assigned *after* the scavenger goroutine is started,
so when the scavenger calls entersyscall() the g==scvg check can fail.
Fixes #5025.

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/7629045

The problem is that there are lots of dead G's from previous tests,
each dead G consumes 1 stack segment.
Fixes #5034.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7749043

Update #5005.

R=golang-dev, fullung, bradfitz
CC=golang-dev
https://golang.org/cl/7651045

Adds a new reader to filter newlines, which fixes errors seen in the
decoder chunking code. Found additional issues with whitespace handling
after the first padding character.
Fixes #4779.

R=minux.ma, rsc, bradfitz
CC=golang-dev
https://golang.org/cl/7311069

Generated by addca.

R=gobot
CC=golang-dev
https://golang.org/cl/7592044

The system call takes an int, but the kernel stores it in a uint16.
At least one Linux system sets /proc/sys/net/core/somaxconn
to 262144, which ends up being 0 in the uint16. Avoid being tricked.

FreeBSD sources also store the backlog in a uint16.
Assume the problem is systemic and fix it everywhere.

Fixes #5030.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7480046

Noticed while doing other XML investigations.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7550045

The old code just assumed that the only thing
you can embed is a struct. Not true.

Fixes #3803.

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/7743043

This isn't as bad as it used to be, but add a bit
more detail to close the issue.

Fixes #3359

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/7606044

R=dsymonds, dave
CC=golang-dev
https://golang.org/cl/7568045

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7739043

Also rename the go parser test to GoParse so it doesn't grab the globally useful Parse name.

R=golang-dev, dave
CC=golang-dev
https://golang.org/cl/7732044

Edit encoding/base64's internals and tests to match encoding/base32.

Properly handling line breaks in padding is left for another CL.

R=dsymonds
CC=golang-dev
https://golang.org/cl/7693044

Mention the syntax is defined by the regexp/syntax package.
Fixes #3953.

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/7702044

Fixes #4519.

R=rsc
CC=golang-dev
https://golang.org/cl/7733044

The copy of c++filt shipped on OS X is six years old,
and in our case it does far more mangling than it
does demangling. People on non-OS X systems will
have a working nm --demangle, so this won't affect them.

$ sw_vers
ProductName:	Mac OS X
ProductVersion:	10.8.2
BuildVersion:	12C2034
$ c++filt --version
GNU c++filt 070207 20070207
Copyright 2005 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License.  This program has absolutely no warranty.
$

$ go tool nm -n revcomp | grep quoteWith
   4f560 T strconv.quoteWith
$ go tool nm -n revcomp | grep quoteWith  | c++filt
   f560 T strconv.quoteWith
$

$ nm -n revcomp | grep quoteWith
000000000004f560 t _strconv.quoteWith
$ nm -n revcomp | grep quoteWith | c++filt
000000000004f560 unsigned short _strconv.quoteWith
$

Fixes #4818.

R=golang-dev, r, bradfitz
CC=golang-dev
https://golang.org/cl/7729043