Fixes #3530.

R=golang-dev, rsc, bradfitz
CC=golang-dev
https://golang.org/cl/6032052

R=golang-dev, kevlar
CC=golang-dev
https://golang.org/cl/6075045

R=golang-dev, kevlar
CC=golang-dev
https://golang.org/cl/6075044

This method will allow us to be explicit about what we're doing when
we insert an implied token, and avoid repeating the logic involved in
multiple places.

R=nigeltao
CC=golang-dev
https://golang.org/cl/6060048

Fixes #3474.

R=nigeltao
CC=golang-dev
https://golang.org/cl/6048050

When FlushInterval is specified on ReverseProxy, the ResponseWriter is
wrapped with a maxLatencyWriter that periodically flushes in a
goroutine. That goroutine was not being cleaned up at the end of the
request. This resulted in a panic when Flush() was being called on a
ResponseWriter that was closed.

The code was updated to always send the done message to the flushLoop()
goroutine after copying the body. Futhermore, the code was refactored to
allow the test to verify the maxLatencyWriter behavior.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/6033043

Previously we capped lengths at 2**24 rather than 2**31.

R=golang-dev, r, r
CC=golang-dev
https://golang.org/cl/6050050

Add a case to ignore doctype tokens.

Clean up the flow of control to more clearly match the spec.

Pass one more test.

R=nigeltao
CC=golang-dev
https://golang.org/cl/6062047

Add case for doctype tokens (which are ignored).

This CL does not change the status of any tests.

R=golang-dev, nigeltao
CC=golang-dev
https://golang.org/cl/6061047

Don't require the home directory to exist. Just check
that it returns something.

Fixes #3531

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/6056045

Fixes #3534.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6035054

Docstrings were not being set for the wrapper
functions returned by the hgcommand decorator.

R=golang-dev, minux.ma, rsc
CC=golang-dev
https://golang.org/cl/6059043

Currently, the html package only runs a limited subset of the tests
in the testdata directory. This tends to limit development of the
parser to fixing the bug that causes the first failing test.

This CL gives it the ability to run all the tests and produce a
log showing the status of each test. (It does it when tests are run with
'go test --update-logs') The status is listed as PASS, FAIL, or PARSE
(PARSE means that parsing produced the correct tree, but rendering and
re-parsing does not produce the same tree).

When 'go test' is run without --update-logs, it runs the tests marked
'PASS' in the logs (and the parsing portion of the tests marked 'PARSE').
Thus it will fail if there has been a regression since the last
time the logs were updated.

My goal for this CL is to allow develoment of the html package to
be less test-driven, while still having the advantages of regression
tests. In other words, one can work on any portion of the parser
and quickly see whether he is breaking things or improving them.

Current statistics of the tests:
$ grep ^PASS *.log|wc -l
        1017
$ grep ^PARSE *.log|wc -l
          46
$ grep ^FAIL *.log|wc -l
         181

R=nigeltao
CC=golang-dev
https://golang.org/cl/6031049

R=golang-dev, r, r
CC=golang-dev
https://golang.org/cl/6051044

R=golang-dev, bradfitz, akumar
CC=golang-dev
https://golang.org/cl/5629054

R=golang-dev, bradfitz, akumar
CC=golang-dev
https://golang.org/cl/6017043

This change comes from CL 5536043,
created by Andrey Mirtchovski. His
description follows:

"The plan9 exec child handler does not manage
dup-ed fds from the parent correctly: when a
dup-ed file descriptor appears in the child's fd
list it is closed when first encountered and then
subsequent attempt to dup it later in Pass 2 fails,
resulting in 'fork/exec: fd out of range or not
open'."

R=golang-dev, rminnich, ality
CC=golang-dev, mirtchovski, rsc
https://golang.org/cl/6009046

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/6037052

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/5989045

Update runtime defs for openbsd. Add struct __tfork, which will be
needed by an upcoming change.

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/6007050

Fixes #3487.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/6011050

    Fixes #3529.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/6037046

Fixes #3495.

I adapted fmt.TestCountMallocs to fix the
existing tests. As the resulting tests did not
appear to belong to either itoa or ftoa I moved
them into their own file.

R=bradfitz, fullung
CC=golang-dev
https://golang.org/cl/5985072

R=r
CC=golang-dev
https://golang.org/cl/6031046

Also enables turning /= 2 in a right shift.

Part of issue 2230.

R=rsc
CC=golang-dev, remy
https://golang.org/cl/6012049

R=golang-dev, r
CC=golang-dev, gri
https://golang.org/cl/6010051

R=golang-dev, remyoudompheng, dsymonds, gustavo, dchest, r, rsc
CC=golang-dev
https://golang.org/cl/5985059

The buffer had 64 bytes but needs one more for the sign.

Fixes #3510.

R=golang-dev, dave, dsymonds
CC=golang-dev
https://golang.org/cl/6011057

When SNI based certificate selection is enabled, we previously used
the default private key even if we selected a non-default certificate.

Fixes #3367.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5987058

Fixes #3502.

R=bradfitz
CC=golang-dev
https://golang.org/cl/6011046

benchmark                             old ns/op    new ns/op    delta
garbage.BenchmarkParser              4370050250   3779668750  -13.51%
garbage.BenchmarkParser-2            3713087000   3628771500   -2.27%
garbage.BenchmarkParser-4            3519755250   3406349750   -3.22%
garbage.BenchmarkParser-8            3386627750   3319144000   -1.99%

garbage.BenchmarkTree                 493585529    408102411  -17.32%
garbage.BenchmarkTree-2               500487176    402285176  -19.62%
garbage.BenchmarkTree-4               473238882    361484058  -23.61%
garbage.BenchmarkTree-8               486977823    368334823  -24.36%

garbage.BenchmarkTree2                 31446600     31203200   -0.77%
garbage.BenchmarkTree2-2               21469000     21077900   -1.82%
garbage.BenchmarkTree2-4               11007600     10899100   -0.99%
garbage.BenchmarkTree2-8                7692400      7032600   -8.58%

garbage.BenchmarkParserPause          241863263    163249450  -32.50%
garbage.BenchmarkParserPause-2        120135418    112981575   -5.95%
garbage.BenchmarkParserPause-4         83411552     64580700  -22.58%
garbage.BenchmarkParserPause-8         51870697     42207244  -18.63%

garbage.BenchmarkTreePause             20940474     13147011  -37.22%
garbage.BenchmarkTreePause-2           20115124     11146715  -44.59%
garbage.BenchmarkTreePause-4           17217584      7486327  -56.52%
garbage.BenchmarkTreePause-8           18258845      7400871  -59.47%

garbage.BenchmarkTree2Pause           174067190    172674190   -0.80%
garbage.BenchmarkTree2Pause-2         131175809    130615761   -0.43%
garbage.BenchmarkTree2Pause-4          95406666     93972047   -1.50%
garbage.BenchmarkTree2Pause-8          86056095     85334952   -0.84%

garbage.BenchmarkParserLastPause      329932000    324790000   -1.56%
garbage.BenchmarkParserLastPause-2    209383000    210456000   +0.51%
garbage.BenchmarkParserLastPause-4    113981000    112921000   -0.93%
garbage.BenchmarkParserLastPause-8     77967000     76625000   -1.72%

garbage.BenchmarkTreeLastPause         29752000     18444000  -38.01%
garbage.BenchmarkTreeLastPause-2       24274000     14766000  -39.17%
garbage.BenchmarkTreeLastPause-4       19565000      8726000  -55.40%
garbage.BenchmarkTreeLastPause-8       21956000     10530000  -52.04%

garbage.BenchmarkTree2LastPause       314411000    311945000   -0.78%
garbage.BenchmarkTree2LastPause-2     214641000    210836000   -1.77%
garbage.BenchmarkTree2LastPause-4     110024000    108943000   -0.98%
garbage.BenchmarkTree2LastPause-8      76873000     70263000   -8.60%

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5991049

This is factored out part of the:
https://golang.org/cl/5279048/
(parallel GC)

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5993043

It's a common error to reference unexported field names in templates,
especially for newcomers. This catches the error at parse time rather than
execute time so the rare few who check errors will notice right away.

These were always an error, so the net behavior is unchanged.
Should break no existing code, just identify the error earlier.

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/6009048

adg removed some now-unwanted fields in Package a while ago,
but there are still datastore entities with those fields,
so we must explicitly check for ErrFieldMismatch and ignore it.

R=golang-dev, rsc
CC=adg, golang-dev
https://golang.org/cl/6007043

below do not support '.

This makes package html consistent with package text/template's
HTMLEscape function.

Fixes #3489.

R=rsc, mikesamuel, dsymonds
CC=golang-dev
https://golang.org/cl/5992071

The least common multiple is not totient/gcd.

R=remyoudompheng
CC=golang-dev
https://golang.org/cl/5990045

crypto/tls is tested, in part, by replaying recorded TLS connections
and checking that the bytes sent by the Go code haven't changed.

Previously we used GnuTLS's debug output and extracted the bytes of
the TLS connection using a Python script. That wasn't great, and I
think GnuTLS removed that level of debugging in a more current
release.

This change records the connection with Go code and adds a test for
ECDHE-AES clients generating using this method.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5988048

For completeness, we also expose the Canonical Combining Class of a rune.
This does not increase the data size.

R=r
CC=golang-dev
https://golang.org/cl/5931043

2011 Mac Mini, Core i5 @ 2.3Ghz

BenchmarkConvT2E        50000000                40.4 ns/op
BenchmarkConvT2EBig     20000000               107 ns/op
BenchmarkConvT2I        100000000               28.9 ns/op
BenchmarkConvI2E        500000000                5.93 ns/op
BenchmarkConvI2I        100000000               19.0 ns/op
BenchmarkAssertE2T      100000000               14.1 ns/op
BenchmarkAssertE2TBig   100000000               17.8 ns/op
BenchmarkAssertE2I      100000000               21.3 ns/op
BenchmarkAssertI2T      100000000               14.3 ns/op
BenchmarkAssertI2I      100000000               20.8 ns/op
BenchmarkAssertI2E      500000000                5.58 ns/op

Pandaboard, 2 x Omap4 @ 1.2Ghz

BenchmarkConvT2E        10000000               215 ns/op
BenchmarkConvT2EBig      1000000              3697 ns/op
BenchmarkConvT2I         5000000               666 ns/op
BenchmarkConvI2E        50000000                42.4 ns/op
BenchmarkConvI2I         5000000               489 ns/op
BenchmarkAssertE2T      20000000                90.0 ns/op
BenchmarkAssertE2TBig   20000000                91.6 ns/op
BenchmarkAssertE2I       5000000               515 ns/op
BenchmarkAssertI2T      20000000               124 ns/op
BenchmarkAssertI2I       5000000               517 ns/op
BenchmarkAssertI2E      50000000                47.2 ns/op
BenchmarkAssertE2E      50000000                42.7 ns/op

R=minux.ma, rsc, fullung, bsiegert, dsymonds
CC=golang-dev
https://golang.org/cl/5777048

Update the threxit and thrsleep syscalls to match the ABI of the
OpenBSD 5.1 kernel. These changes are backwards compatible with
older kernels.

Fixes #3311.

R=golang-dev, rsc, devon.odell
CC=golang-dev
https://golang.org/cl/5777079