This patch resulted from a bit of quick optimisation in response to a
golang-nuts post. It looks like one could save a couple other copies in
this function, but this addresses the inner loop and is fairly simple.

benchmark                    old ns/op    new ns/op    delta
BenchmarkGCD10x10                 1964         1711  -12.88%
BenchmarkGCD10x100                2019         1736  -14.02%
BenchmarkGCD10x1000               2471         2171  -12.14%
BenchmarkGCD10x10000              6040         5778   -4.34%
BenchmarkGCD10x100000            43204        43025   -0.41%
BenchmarkGCD100x100              11004         8520  -22.57%
BenchmarkGCD100x1000             11820         9446  -20.08%
BenchmarkGCD100x10000            23846        21382  -10.33%
BenchmarkGCD100x100000          133691       131505   -1.64%
BenchmarkGCD1000x1000           120041        95591  -20.37%
BenchmarkGCD1000x10000          136887       113600  -17.01%
BenchmarkGCD1000x100000         295370       273912   -7.26%
BenchmarkGCD10000x10000        2556126      2205198  -13.73%
BenchmarkGCD10000x100000       3159512      2808038  -11.12%
BenchmarkGCD100000x100000    150543094    139986045   -7.01%

R=gri, remyoudompheng
CC=bradfitz, gobot, golang-dev, gri
https://golang.org/cl/9424043

This is needed for preemptive scheduler,
it will preempt only when m->locks==0,
and we do not want to be preempted while
we have not completely unlocked the lock.

R=golang-dev, khr, iant
CC=golang-dev
https://golang.org/cl/9196047

Compiler can detect and delete dead code with enums,
but can not with static vars.

R=golang-dev, dave, r
CC=golang-dev
https://golang.org/cl/9377043

Also change table type from int32[] to int8[] to save space in L1$.

benchmark          old ns/op    new ns/op    delta
BenchmarkMalloc           42           40   -4.68%

R=golang-dev, bradfitz, r
CC=golang-dev
https://golang.org/cl/9199044

Fixes windows build.

R=golang-dev
CC=golang-dev
https://golang.org/cl/9429043

Test for CL 9226043.

R=golang-dev, dave, iant, bradfitz
CC=golang-dev
https://golang.org/cl/9249043

Fixes #5451

R=gri
CC=dsymonds, gobot, golang-dev
https://golang.org/cl/9388043

Fixes #5447.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/9343045

Trying to lookup user's display name with directory services can
take several seconds when user's computer is not in a domain.
As a workaround, check if computer is joined in a domain first,
and don't use directory services if it is not.
Additionally, don't leak tokens in user.Current().
Fixes #5298.

R=golang-dev, bradfitz, alex.brainman, lucio.dere
CC=golang-dev
https://golang.org/cl/8541047

This fixes fontification, navigation and indentation for methods
of the form `func (Foo) Bar...`

R=adonovan
CC=gobot, golang-dev
https://golang.org/cl/8951043

testing/quick: fix for aliased types, delete duplicate uint8 test, and fix randFloat64() to give random numbers from (-math.MaxFloat64, math.MaxFloat64).

R=r, agl
CC=agl, bradfitz, golang-dev
https://golang.org/cl/9296046

Update #5134

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/9406046

Reduces garbage.

R=adg, r
CC=dsymonds, gobot, golang-dev
https://golang.org/cl/9088045

Fixes #5424.

R=golang-dev, daniel.morsing, dvyukov, r
CC=golang-dev
https://golang.org/cl/9033048

Uses SSE instructions to process 16 bytes at a time.

fixes #5354

R=bradfitz, google
CC=golang-dev
https://golang.org/cl/8853048

The *Encoder is almost always garbage. It doesn't need an
encodeState inside of it (and its bytes.Buffer), since it's
only needed locally inside of Encode.

benchmark                 old ns/op    new ns/op    delta
BenchmarkEncoderEncode         2562         2553   -0.35%

benchmark                 old bytes    new bytes    delta
BenchmarkEncoderEncode          283          102  -63.96%

R=r
CC=gobot, golang-dev
https://golang.org/cl/9365044

Need to use (or stub) exact.Value.

R=gri
CC=golang-dev
https://golang.org/cl/9126043

        The encoded string must include the : separating the username
        and the password, even when the latter is empty. See
        http://www.ietf.org/rfc/rfc2617.txt for more information.

R=golang-dev, bradfitz, adg
CC=golang-dev
https://golang.org/cl/8475043

Generated by addca.

R=gobot
CC=golang-dev
https://golang.org/cl/9419045

Fixes #5290.

R=golang-dev, dave, bradfitz, r
CC=golang-dev
https://golang.org/cl/8763044

R=golang-dev, iant, bradfitz, nigeltao
CC=golang-dev
https://golang.org/cl/9408044

for this program:
package A
import testing

old diagnostics:
pkg.go:2: syntax error: unexpected semicolon or newline, expecting string literal

now:
pkg.go:2: syntax error: missing import path; require quoted string

Fixes #5332.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/9393043

Fixes #5456.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/9400044

cmp(1) on FreeBSD requires two file arguments.  grep -P on Linux (at least
Ubuntu 12.04) is described in the man page as "This is highly
experimental" and doesn't seem to work. On FreeBSD the man page states
"This option  is not supported in FreeBSD."  Needed this to work while
debugging some funky behavior of 'Import' in my local vim setup.

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/7675043

It's just noise. They've already been acknowledged in except.txt.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/9392047

Negative base now means "automatic". Fixes a higher
level race.

Fixes #5418

R=gri
CC=golang-dev
https://golang.org/cl/9269043

Move the documentation from race.go to doc.go, because
race.go uses +build race, so it's not normally parsed by go doc.
Rephrase the documentation for end users, provide link to race
detector manual.
Fixes #5444.

R=golang-dev, minux.ma, adg, r
CC=golang-dev
https://golang.org/cl/9144050

R=adg, r
CC=golang-dev
https://golang.org/cl/9344044

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/9124045

runtime.park() can access freed select descriptor
due to a racing free in another thread.
See the comment for details.

Slightly modified version of dvyukov's CL 9259045.

No test yet.  Before this CL, the test described in issue 5422
would fail about every 40 times for me.  With this CL, I ran
the test 5900 times with no failures.

Fixes #5422.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/9311043

Fixes #5430.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/9305043

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/9288045

This works around a bug in GCC 4.8.0.

Fixes #5118.

R=golang-dev, r, minux.ma
CC=golang-dev
https://golang.org/cl/9120045

Fixes #5349.

R=golang-dev, lucio.dere, dsymonds, bradfitz, iant, adg, dave, r
CC=golang-dev
https://golang.org/cl/9159043

Fixes #5421.

R=golang-dev, bradfitz, adg
CC=golang-dev
https://golang.org/cl/9274043

R=golang-dev, adg, r
CC=golang-dev
https://golang.org/cl/9250043

The linker can generate split stack prolog when a textflag 7 function
makes an indirect function call.  If it happens, badsignal() crashes
trying to dereference g.
Fixes #5337.

R=bradfitz, dave, adg, iant, r, minux.ma
CC=adonovan, golang-dev
https://golang.org/cl/9226043

Update #5236
Update #5402
This CL reduces gofmt's committed memory from 545864 KiB to 139568 KiB.
Note: Go 1.0.3 uses about 70MiB.

R=golang-dev, r, iant, nightlyone
CC=golang-dev
https://golang.org/cl/9245043