Adapted from https://golang.org/cl/11564044.

Fixes breakage of darwin-amd64-race builder.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/13352045

See how it flies. We'll disable it again if the underlying issue is not resolved.
See issue 4155 for details.

Fixes #4155.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/13368045

Update #4856

R=golang-dev, bradfitz, dave
CC=golang-dev
https://golang.org/cl/12916046

Fixes #3944.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/13263043

Causes the package dependencies to include those for race detection.
Fixes #5653.

R=golang-dev, dave, bradfitz
CC=golang-dev
https://golang.org/cl/13236045

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/13334043

R=golang-dev, remyoudompheng
CC=golang-dev
https://golang.org/cl/12795052

Merge the comment from runtime/time.goc ("at least")
and also note that negative is okay and won't crash.
I see people going out of their way to avoid passing
a negative value to Sleep.

R=golang-dev, adg, r, alex.brainman
CC=golang-dev
https://golang.org/cl/13271045

The method is simple: the parser just parses

        {{if A}}a{{else if B}}b{{end}}

to the same tree that would be produced by

        {{if A}}a{{else}}{{if B}}b{{end}}{{end}}

Thus no changes are required in text/template itself
or in html/template, only in text/template/parse.

Fixes #6085

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/13327043

The previous wording, though accurate, was hard to parse.
In particular, it was tempting to interpret "the method"
as referring to "the function f" instead of "Do", and
required effort to find the correct antecedent for
"this receiver".

R=golang-dev, bradfitz, r
CC=golang-dev
https://golang.org/cl/13307043

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/13313043

Fixes #6221

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/13289043

It wasn't obvious that the Auth could be nil.

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/13060048

Fixes #5910.
Fixes #6260.

R=golang-dev, daniel.morsing
CC=golang-dev
https://golang.org/cl/13257044

Fixes #6247.

R=golang-dev, lucio.dere, bradfitz
CC=golang-dev
https://golang.org/cl/13216043

Removed posix assumptions in temporary file generation
Removed curl dependence
Changed opening of svg file

These must now work including symbol resolution.
[1] go tool pprof <prog_name> http://.../debug/pprof/profile
[2] go tool pprof http://.../debug/pprof/profile

Fixes 6177.

R=golang-dev, alex.brainman, bradfitz, kamil.kisiel
CC=golang-dev
https://golang.org/cl/13085043

A bullet list was getting mangled in godoc.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/13060047

Reduce the number of allowed swap operations during stable sort. 

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/12907045

Some users have multiple Go development trees and invoke the
'go' tool via a wrapper that sets GOROOT and GOPATH based on
the current directory.  Such users should customize go-command
to point to the wrapper script.

R=dominik.honnef
CC=golang-dev
https://golang.org/cl/13233043

No measurable impact on performance on amd64

R=golang-dev, khr, bradfitz
CC=golang-dev
https://golang.org/cl/13096045

R=golang-dev, dave
CC=golang-dev
https://golang.org/cl/13274043

Fixes #4195

R=golang-dev, mikioh.mikioh
CC=golang-dev
https://golang.org/cl/12960046

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/13262043

Apply the same rules for argument evaluation and indirection that are
used by the regular evaluator.

Fixes #5802

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/13257043

Just forgot to include this in CL 12843043.
Also consolidates the code dealing with test environment.

Update #6122

R=alex.brainman
CC=golang-dev
https://golang.org/cl/13184043

R=golang-dev, dave, bradfitz, adg
CC=golang-dev
https://golang.org/cl/13249043

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/13232043

RFC 6265 allows a leading dot in a cookie domain attribute
but is clear (see section 4.1.1) that a Set-Cookie header
should be sent without these dots.

R=bradfitz
CC=golang-dev
https://golang.org/cl/13111043

With my apologies.

R=golang-dev, alex.brainman
CC=golang-dev
https://golang.org/cl/12984045

NetBSD 6 kernel and beyond require 64-bit aligned access to routing
facilities.

Fixes #6226.

R=golang-dev, bsiegert, bradfitz
CC=golang-dev
https://golang.org/cl/13170043

== isn't defined on slices, so don't use it in docs.

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/12983045

OS X in particular deletes tmp files (but not directories)
pretty reliably.

Ask hg whether the go.tools directory in tmp is good before
using it.

Fixes issue Rob and others were reporting, which I just hit
myself now.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/13084049

This was breaking people setting GOARCH=386 before running
all.bash on amd64 machines.

cmd/go puts different architecture binaries where "go tool"
can't find them.

R=golang-dev, r, khr
CC=golang-dev
https://golang.org/cl/13139044

R=golang-dev, dave
CC=golang-dev
https://golang.org/cl/12917050

Current for Plan 9 is implemented with /dev/user for
Uid/Gid/Username/Name, and $home environment variable for
HomeDir.

Implementing Lookup/LookupId is not done, which would
require parsing /adm/users. It is unclear of how much benefit
this would be.

R=golang-dev
CC=bradfitz, golang-dev, r
https://golang.org/cl/13203043

Also use clone(2) syscall instead of fork().

Fixes #6214.

R=golang-dev, bradfitz, dave
CC=golang-dev
https://golang.org/cl/13159044

the use of the flag, especially for objects which actually do have
pointers but we don't want the GC to scan them.

R=golang-dev, cshapiro
CC=golang-dev
https://golang.org/cl/13181045

slice type to an array type, the haspointer-ness may change.
Before this change, we'd sometimes get types like [1]int marked
as having pointers.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/13189044

Update #5780

R=golang-dev, cshapiro, dave, bradfitz
CC=golang-dev
https://golang.org/cl/12869049

Update #6214

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/13160043