Fixes #4582.

* mentioned hg upload.
* added section on hg file.
* added small mention about being inside $GOROOT.
* added hg revert @NNNN
* reorganise the hg submit section for the common case of a non committer.
* made the Copyright section h2
* added note about leaving copyright years unchanged.

R=golang-dev, metanata4, shivakumar.gn, minux.ma, adg, shanemhansen
CC=golang-dev, metanata4
https://golang.org/cl/7278047

Support reading pax archives and applying extended attributes
like long names, subsecond mtime resolutions, etc. Default to
writing pax archives for long file and link names.
Support reading gnu archives using the ././@LongLink extended
header for file name and link target.

Fixes #3300

R=dsymonds, dave, rogpeppe, remyoudompheng, chressie, rsc
CC=golang-dev
https://golang.org/cl/6700047

R=golang-dev, nigeltao
CC=golang-dev
https://golang.org/cl/7304069

Fixes #4010.

This proposal avoids cluttering the main install-source.html with OS specific instructions by linking to the wiki for details. See discussion in the comments.

R=adg, minux.ma
CC=golang-dev
https://golang.org/cl/7241068

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/7308079

Generated by addca.

R=gobot
CC=golang-dev
https://golang.org/cl/7303069

The spec is not clear about whether this is allowed or not,
but both compilers allow it, because the reflect implementation
takes advantage of it. Document current behavior.

Fixes #4679.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7303064

Add benchmarks for common http benchmarking tools. The intent is to catch optimisations which favor synthetic benchmarks that do not show improvements for real clients like Chrome.

BenchmarkReadRequestChrome        200000             10133 ns/op          60.29 MB/s        3148 B/op         32 allocs/op
BenchmarkReadRequestCurl          500000              4314 ns/op          18.08 MB/s         905 B/op         15 allocs/op
BenchmarkReadRequestApachebench   500000              4363 ns/op          18.79 MB/s         956 B/op         16 allocs/op
BenchmarkReadRequestSiege         500000              6408 ns/op          24.19 MB/s        1397 B/op         22 allocs/op
BenchmarkReadRequestWrk          1000000              2838 ns/op          14.09 MB/s         757 B/op         11 allocs/op

R=golang-dev, bradfitz
CC=golang-dev, haimuiba
https://golang.org/cl/7300075

Fixes #4573.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7322043

On Windows, CryptoAPI is finding an alternative validation path. Since
this is a little non-deterministic, this change disables that test
when using system validation.

R=golang-dev
CC=golang-dev
https://golang.org/cl/7313068

R=golang-dev, minux.ma
CC=golang-dev
https://golang.org/cl/7314071

By default, crypto/x509 assumes that users wish to validate
certificates for ServerAuth. However, due to historical reasons,
COMODO's intermediates don't specify ServerAuth as an allowed key
usage.

Rather NSS and CryptoAPI both allow these SGC OIDs to be equivalent to
ServerAuth.

R=rsc
CC=golang-dev
https://golang.org/cl/7312070

R=golang-dev, agl, bradfitz, rsc
CC=golang-dev
https://golang.org/cl/7299064

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/7305065

The socket for AF_UNIX domain with SOCK_DGARM type isn't
allowed to work with syscall listen.

R=rsc
CC=golang-dev
https://golang.org/cl/7310068

R=rsc, minux.ma
CC=golang-dev
https://golang.org/cl/7300063

R=golang-dev, rsc
CC=dave, dvyukov, golang-dev, minux.ma, remyoudompheng
https://golang.org/cl/7252047

Add benchmark for request parsing. Fixture data is taken from https://github.com/felixge/node-http-perf

% go version
go version devel +28966b7b2f0c Thu Feb 07 20:26:12 2013 -0800 linux/amd64

% go test -run=nil -bench=ReadRequest -benchtime=10s
PASS
BenchmarkReadRequest     2000000   9900 ns/op   61.71 MB/s   3148 B/op   32 allocs/op
ok      net/http        12.180s

R=golang-dev, bradfitz, minux.ma, haimuiba
CC=golang-dev
https://golang.org/cl/7313048

On POSIX, '=' in key is explicitly invalid, and '\x00' in key/value is implicitly invalid.

R=golang-dev, iant, bradfitz
CC=golang-dev
https://golang.org/cl/7311061

R=golang-dev, adg, bradfitz
CC=golang-dev
https://golang.org/cl/7314046

syscall.{Kill,Write} are not portable to MS Windows, so we
disable them for now.

R=iant, rsc
CC=golang-dev
https://golang.org/cl/7312066

R=gri, iant
CC=golang-dev
https://golang.org/cl/7226065

With the new scheduler races in the tests are reported during execution of other tests.
The change joins goroutines started during the tests.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7310066

The problem happens when end=0, then end-1 is very big number.
Observed with the new scheduler.

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/7307073

R=golang-dev, dave, bradfitz
CC=golang-dev
https://golang.org/cl/7300065

R=golang-dev, dave
CC=golang-dev
https://golang.org/cl/7299067

See issue 887 for the 8g analogue.

R=golang-dev, minux.ma
CC=golang-dev
https://golang.org/cl/7306069

R=dave, rsc
CC=golang-dev
https://golang.org/cl/7299055

R=golang-dev, dave, minux.ma, bradfitz, rsc
CC=golang-dev
https://golang.org/cl/7312055

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/7307070

Depends on https://golang.org/cl/7308067

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7312064

It might be non-blocking, but it also might be blocking.
Cannot take the chance, as Accept might block indefinitely
and make it impossible to acquire ForkLock exclusively
(during fork+exec).

Fixes #4737.

R=golang-dev, dave, iant, mikioh.mikioh
CC=golang-dev
https://golang.org/cl/7309050

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7309061

Before and after:
BenchmarkTrimSpace  20000000   81.3 ns/op
BenchmarkTrimSpace  50000000   58.0 ns/op

(most whitespace trimming is ASCII whitespace)

Same optimization appeared a handful of other places
in this file, but not here.

R=golang-dev, dave
CC=golang-dev
https://golang.org/cl/7305063

Fixes #887.

R=ken2
CC=golang-dev
https://golang.org/cl/7303061

R=golang-dev, minux.ma, agl
CC=golang-dev
https://golang.org/cl/7305059

R=golang-dev, minux.ma
CC=golang-dev
https://golang.org/cl/7308060

R=golang-dev, dave, bradfitz
CC=golang-dev
https://golang.org/cl/7305053

On 800MHz Cortex-A8:
benchmark           old ns/op    new ns/op    delta
BenchmarkRC4_128         9395         2838  -69.79%
BenchmarkRC4_1K         74497        22120  -70.31%
BenchmarkRC4_8K        587243       171435  -70.81%

benchmark            old MB/s     new MB/s  speedup
BenchmarkRC4_128        13.62        45.09    3.31x
BenchmarkRC4_1K         13.75        46.29    3.37x
BenchmarkRC4_8K         13.79        47.22    3.42x

Result for "OpenSSL 1.0.1c 10 May 2012" from Debian/armhf sid:
type             16 bytes     64 bytes    256 bytes   1024 bytes   8192 bytes
rc4              39553.81k    46522.39k    49336.11k    50085.63k    50258.06k

R=golang-dev, agl, dave
CC=golang-dev
https://golang.org/cl/7310051

This is necessary for systems that use select as the pollster,
such as Solaris (supported by gccgo).  It corresponds to the
bool returned by AddFD.  In general it's not clearly defined
what happens when a descriptor used in a select is closed, and
different systems behave differently.  Waking up the select
will cause the right thing to happen: the closed descriptor
will be dropped from the next iteration.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/7303056