Attempting to fix windows gobuilders

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/13507044

Lay out the doc and write text for the minor changes.
(I left the net ones for someone who understands them better,
or for someone to describe them to me better so I can write them.)
Much still to do.

Delete go1.2.txt so there's only one thing to update.

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/13597044

R=golang-dev, adg
CC=bradfitz, golang-dev, remyoudompheng
https://golang.org/cl/13568045

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/13383045

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/13426046

Existing example renamed to Example_sortWrapper.
Fixes #6335.

R=golang-dev, rsc, taj.khattra, r
CC=golang-dev
https://golang.org/cl/13586043

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/13436045

See https://code.google.com/p/go/issues/detail?id=6339#c3

Fixes #6339

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/13553044

The huffmanDecoder struct appears to be intented for reuse by calling init a
second time with a second sequence of code lengths. Unfortunately, it can
currently panic if the second sequence of code lengths has a minimum value
greater than 10 due to failure to reinitialize the links table.

This change prevents the panic by resetting the huffmanDecoder struct back to
the struct's zero value at the beginning of the init method if the
huffmanDecoder is being reused (determined by checking if min has been set to a
non-zero value).

Fixes #6255.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/13230043

Generated by addca.

R=gobot
CC=golang-dev
https://golang.org/cl/13234049

Currently lots of sys allocations are not accounted in any of XxxSys,
including GC bitmap, spans table, GC roots blocks, GC finalizer blocks,
iface table, netpoll descriptors and more. Up to ~20% can unaccounted.
This change introduces 2 new stats: GCSys and OtherSys for GC metadata
and all other misc allocations, respectively.
Also ensures that all XxxSys indeed sum up to Sys. All sys memory allocation
functions require the stat for accounting, so that it's impossible to miss something.
Also fix updating of mcache_sys/inuse, they were not updated after deallocation.

test/bench/garbage/parser before:
Sys		670064344
HeapSys		610271232
StackSys	65536
MSpanSys	14204928
MCacheSys	16384
BuckHashSys	1439992

after:
Sys		670064344
HeapSys		610271232
StackSys	65536
MSpanSys	14188544
MCacheSys	16384
BuckHashSys	3194304
GCSys		39198688
OtherSys	3129656

Fixes #5799.

R=rsc, dave, alex.brainman
CC=golang-dev
https://golang.org/cl/12946043

Fixes #6179

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/12916047

Fixes #6131.

R=golang-dev, daniel.morsing, rsc
CC=golang-dev
https://golang.org/cl/12800045

For some long filenames the USTAR-split code does not work
correctly. It is wrongly assumed that the path would not be too long,
but it is.

The user visible result was that a filename was split, but it still
caused an error.

The cause was a wrongly calculated nlen. In addition I noticed that
at this place it is also seems necessary to check if the prefix will
fit in the 155 chars available for the prefix.

R=dsymonds, rsc
CC=golang-dev
https://golang.org/cl/13300046

Old example referenced global var from multiSorter.Sort and ignored it's argument.
Changed one of example calls to actually pass slice to sort.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/13551044

Lucio De Re reports that the more complex
loop miscompiles on Plan 9.

R=ken2
CC=golang-dev
https://golang.org/cl/13602043

* Sort imports by import path, then import name, then comment. Currently, gofmt sorts only by import path.
* If two imports have the same import path and import name, and one of them has no comment, remove the import with no comment. (See the discussion at issue 4414.)

Based on @rsc's https://golang.org/cl/7231070/

Fixes #4414.

R=gri, rsc
CC=golang-dev
https://golang.org/cl/12837044

R=golang-dev
CC=golang-dev
https://golang.org/cl/13521044

R=adonovan
CC=golang-dev
https://golang.org/cl/13476043

Fixes #6186.

R=golang-dev, bradfitz, remyoudompheng, rsc
CC=golang-dev
https://golang.org/cl/13112043

This message was helpful for pre-Go 1 users updating to Go 1.
That time is past. Now the message is confusing because it
depends on knowing what pre-Go 1 looked like.

Update #4697.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/13335051

Make sure we never pass a timer into timerproc with
a negative duration since it will cause other timers
to never expire.

Fixes #5321.

R=golang-dev, minux.ma, remyoudompheng, mikioh.mikioh, r, bradfitz, rsc, dvyukov
CC=golang-dev
https://golang.org/cl/9035047

O_SYNC changes only on linux-arm (and linux-arm-cgo), but
changes to match O_SYNC on linux-{386,amd64} and what Linux
upstream now uses.  See discussion and links on
https://golang.org/cl/13261050/

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/13575045

Update #5935

R=golang-dev, rsc, iant, dave
CC=golang-dev
https://golang.org/cl/13261050

But keep their case for ease of searching.

They were added recently. We don't want them part of go1.2's API.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/13569044

Fixes #6084

R=golang-dev, rsc, dave
CC=golang-dev
https://golang.org/cl/13523044

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/13592043

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/13587043

cmd/cc: bv.c imports libc.h twice

When using the Plan 9 compiler, the invocation

        #include <../ld/textflag.h>

works for the toolchain, but not for the MACH library.

Module cmd/cc/bv.c includes libc.h and "cc.h", which in
turn also includes libc.h.  In the Plan 9 context, this
causes a number of duplicate definitions.

R=golang-dev, rsc, r
CC=golang-dev
https://golang.org/cl/13303047

It's not needed to analyze coverage data.
Fixes #6120

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/13343050

These tests were suggested in golang.org/issue/6080.
They were fixed as part of the new nil pointer checks
that I added a few weeks ago.

Recording the tests as part of marking the issue closed.

Fixes #6080.

R=golang-dev, r, bradfitz
CC=golang-dev
https://golang.org/cl/13255049

Flushing after every token negates the point of buffering. A different approach is required.

««« original CL description
encoding/xml: flush buffer after encoding token

R=rsc, bradfitz, adg
CC=golang-dev
https://golang.org/cl/13004046

»»»

R=golang-dev, adg, rsc
CC=golang-dev
https://golang.org/cl/13515043

This should have been part of revision 16731:cdedb129e020, but
I missed it.  This fixes printing local variables when doing
an external link.

No test because we aren't doing any debug info testing yet.

Fixes #5719.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/13464046

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/13171046

DeepEqual caches addresses of compared values
each time it visits addressable values. This is
more expensive than actually comparing them in
the common case of large slices of bytes or integers.

Also add a fast path for slices with identical
underlying array.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/13000044

Fixes #5240.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/13546044

Also, report allocations in benchmark.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/13410044

The underlying parse tree is visible in text/template, so it should be visible here.
Done by copying the underlying *parse.Tree up to the top level of the struct, and then making sure it's kept up to date.
Fixes #6318.

R=mikesamuel
CC=golang-dev
https://golang.org/cl/13479044

Enable cgo for dragonfly/386 and dragonfly/amd64.

R=golang-dev, jsing, iant, bradfitz
CC=golang-dev
https://golang.org/cl/13247046

Generated by addca.

R=gobot
CC=golang-dev
https://golang.org/cl/13336045