This changes the misc/dist program to generate OS X
packages using pkgbuild and productbuild.

The productbuild utility makes it easy to generate
packages with a custom Distribution file.  This allows
us to add an installcheck script that presents a
friendly message to users who are running on an old
version of Mac OS X.

The change also fixes a few issues with the
postinstall script:

 - In-repo version of the script has been made
   executable. Installers generated using the new
   tools couldn't execute it otherwise.

 - It now uses -d for checking for the existence
   of the Xcode specs directory.

 - The call to sudo.bash has been dropped since cov
   and prof aren't bundled with the binary
   distributions.

Fixes #3455.

Tested on 10.5.8, 10.6.0, 10.6.8 and 10.7.3.

R=adg, golang-dev
CC=golang-dev
https://golang.org/cl/5987044

Fixes #3545.

R=rsc
CC=golang-dev
https://golang.org/cl/6061043

R=rsc, bradfitz
CC=golang-dev
https://golang.org/cl/6099043

Obtained on 700MHz OMAP4460:
benchmark       old ns/op    new ns/op    delta
BenchmarkAbs           61           23  -61.63%

R=dave, remyoudompheng, mtj, rsc
CC=golang-dev
https://golang.org/cl/6094047

Moves the error detection back into execution, where it used to be,
and improves the error message.
Rolls back most of 6009048, which broke lower-case keys in maps.
If it weren't for maps we could detect this at compile time rather than
execution time.

Fixes #3542.

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/6098051

Fixes #3549.

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/6107047

Don't set framesetOK to false for hidden input elements.

Handle <param>, <source>, <track>, <textarea>, <iframe>, <noembed>,
and <noscript>

Pass 7 additional tests.

R=nigeltao
CC=golang-dev
https://golang.org/cl/6094045

benchmark                      old ns/op    new ns/op    delta
BenchmarkAtof64Decimal               344           71  -79.22%
BenchmarkAtof64Float                 397           90  -77.15%
BenchmarkAtof64FloatExp              445          241  -45.84%
BenchmarkAtof64Big                   731          324  -55.68%
BenchmarkAtof64RandomBits            761          453  -40.47%
BenchmarkAtof64RandomFloats          690          314  -54.49%

R=dave, rsc
CC=golang-dev, remy
https://golang.org/cl/5988053

R=golang-dev, dave
CC=golang-dev
https://golang.org/cl/6058043

R=golang-dev, dave, rsc
CC=golang-dev, minux.ma
https://golang.org/cl/6070043

Fixes #3507.

Applied the suggested fix from rsc. If the connection
is in closing state then errClosing will bubble up to
the caller.

The fix has been applied to udp, ip and unix as well as
their code path include nil'ing c.fd on close. Func
tests are available in the linked issue that verified
the bug existed there as well.

R=rsc, fullung, alex.brainman, mikioh.mikioh
CC=golang-dev
https://golang.org/cl/6002053

Reorder some cases.
Handle <pre>, <listing>, </form>, </li>, </dd>, </dt>, </h1>, </h2>,
</h3>, </h4>, </h5>, and </h6> tags.

Pass 6 additional tests.

R=golang-dev, nigeltao
CC=golang-dev
https://golang.org/cl/6089043

This lets the test pass on PPC64 GNU/Linux, which uses a much
larger page size and thus uses more memory to hold blocks
allocated for memory profiling.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6048054

The reverseproxy test depended on the behavior of
runtime.NumGoroutines(), which makes no guarantee when
goroutines are reaped. Instead, modify the flushLoop()
to invoke a callback when it returns, so the exit
from the loop can be tested, instead of the number
of gorountines running.

R=bradfitz
CC=golang-dev
https://golang.org/cl/6068046

        Introduced "runoutput" cmd for running generated program

R=golang-dev, iant, bradfitz, remyoudompheng
CC=golang-dev
https://golang.org/cl/5869049

Fixes #3522.

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/6063054

Reorder some start tags.

Improve handling of </body>.
Handle </html>.

Pass 2 additional tests (by handling </html>).

R=golang-dev, nigeltao
CC=golang-dev
https://golang.org/cl/6082043

pass one additional test

R=golang-dev, nigeltao
CC=golang-dev
https://golang.org/cl/6048051

Clean up the flow of control.
Fix the TODO for handling <html> tags.
Add a case to ignore doctype declarations.

Pass one additional test.

R=nigeltao
CC=golang-dev
https://golang.org/cl/6072047

syscall.Exit would originally kill only the calling
Go proc, leaving behind other procs in the
same group. This change makes syscall.Exit call
runtime·exit, which due to CL
https://golang.org/cl/5617048
will cleanly exit all the Go procs in the group.

R=golang-dev, rsc, rminnich, remyoudompheng, ality, john
CC=golang-dev, mirtchovski
https://golang.org/cl/6036051

Clean up the flow of control, and add a case for doctype tokens (to
ignore them).

R=nigeltao
CC=golang-dev
https://golang.org/cl/6069045

        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