Minor tweaks to avoid assuming that int is always 32 bits.

Update #2188.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/6553062

Can tell this doesn't get run very often, but it is still important
for when you've broken everything else.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/6547065

This CL fixes code that incorrectly assumes that int is 32 bits wide.
Specifically, the socketpair system call expects a pointer to a pair
of int32s, not a pair of ints. Fix this inside the wrappers without
changing the APIs.

Update #2188.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/6552063

Change the grammar so that field access is a proper operator.
This introduces a new node, ChainNode, into the public (but
actually internal) API of text/template/parse. For
compatibility, we only use the new node type for the specific
construct, which was not parseable before. Therefore this
should be backward-compatible.

Before, .X.Y was a token in the lexer; this CL breaks it out
into .Y applied to .X. But for compatibility we mush them
back together before delivering. One day we might remove
that hack; it's the simple TODO in parse.go/operand.

This change also provides grammatical distinction between
        f
and
        (f)
which might permit function values later, but not now.

Fixes #3999.

R=golang-dev, dsymonds, gri, rsc, mikesamuel
CC=golang-dev
https://golang.org/cl/6494119

The code was trying to interpret a uint32 n as a signed quantity
and then store it in an int. For this, int(n) currently works, but when
int becomes 64 bits one must write int(int32(n)) instead, to get
the 32-bit sign extension.

Update #2188.

R=golang-dev, nigeltao
CC=golang-dev
https://golang.org/cl/6551068

Fixes #3917.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/6553061

After each line, ast.Print would do a zero-length write,
which would hit the boundary condition on Plan 9 when
reading over pipes (since message boundaries are
preserved). This change makes sure we only do positive-
length writes.

R=rsc, rminnich, dave, r
CC=golang-dev
https://golang.org/cl/6558046

This was misleading and often confusing for new users.

Leaving the actual weekly release history page for historical reference.

R=golang-dev, rsc, adg
CC=golang-dev
https://golang.org/cl/6555053

Today, if run.go doesn't understand a test header line it just ignores
the test, making it too easy to write or edit tests that are not actually
being run.

- expand errorcheck to accept flags, so that bounds.go and escape*.go can run.
- create a whitelist of skippable tests in run.go; skipping others is an error.
- mark all skipped tests at top of file.

Update #4139.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/6549054

Revision 63f7abcae015 introduced a bug caused by
code assuming registers started at X5, not X0.

Fixes #4138.

R=rsc
CC=golang-dev, remy
https://golang.org/cl/6558043

R=rsc, r
CC=golang-dev
https://golang.org/cl/6552061

When I was a lad (and well past), users were in /usr;
now they're somewhere else, I'm told.
Kids today.

Fixes #4122.

R=golang-dev, dsymonds, rsc
CC=golang-dev
https://golang.org/cl/6552060

Fixes #3670.

R=ken2
CC=golang-dev
https://golang.org/cl/6542058

- remove ambiguous 'it'
- use a lower-case PackageName in the example

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/6552057

The width was not being set on the address, which meant
that the optimizer could not find variables that overlapped
with it and mark them as having had their address taken.
This let to the compiler believing variables had been set
but never used and then optimizing away the set.

Fixes #4129.

R=ken2
CC=golang-dev
https://golang.org/cl/6552059

Fixes #4047.

R=iant, r
CC=golang-dev
https://golang.org/cl/6500065

Use the debug data for enums on windows.

Fixes #4120.

R=alex.brainman
CC=golang-dev
https://golang.org/cl/6545047

Add support for processing the COFF symbol table.

R=alex.brainman
CC=golang-dev
https://golang.org/cl/6551045

Fixes #4082.

R=dsymonds
CC=golang-dev
https://golang.org/cl/6545055

Fixes #4114.

R=golang-dev, iant, rsc, iant, devon.odell
CC=golang-dev
https://golang.org/cl/6553050

R=rsc, r
CC=gobot, golang-dev
https://golang.org/cl/6532049

These talks have been moved to the go.talks sub-repository:
        https://code.google.com/p/go.talks

R=rsc, r
CC=gobot, golang-dev
https://golang.org/cl/6529052

R=rsc, golang-dev
CC=golang-dev
https://golang.org/cl/6528044

Fixes #2446.

R=ken2
CC=golang-dev
https://golang.org/cl/6557044

R=rsc
CC=golang-dev
https://golang.org/cl/6554043

We only pass lower 32 bits of file offset to asm routine.

R=r, dave, rsc
CC=golang-dev
https://golang.org/cl/6499118

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/6548046

*** There is an API change here: the introduction of the
LatinOffset int in the RangeTable struct. ***

* Avoid checking Latin range multiple times for non-Latin runes.
* Use linear search when it is faster than binary search.

go test -calibrate runs the calibration for where the linear/binary
crossover should be.

benchmark                       old MB/s     new MB/s  speedup
BenchmarkFields            36.27        41.43    1.14x
BenchmarkFieldsFunc        36.23        41.38    1.14x

The speedup here is evenly split between the linear scans
and the LatinOffset change. Both are about 1.07x.

R=r
CC=bradfitz, gobot, golang-dev
https://golang.org/cl/6526048

OpenBSD now requires ELF binaries to have a PT_NOTE that identifies
it as an OpenBSD binary. Refactor the existing NetBSD ELF signature
code and implement support for OpenBSD ELF signatures.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6489131

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/6546044

Tests behavior of Once when initialization function panics.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/6554047

The calculation of datsize is redundant.

R=golang-dev, seed, rsc
CC=golang-dev
https://golang.org/cl/6503122

Otherwise they sum up between GCs.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6535048

R=golang-dev, agl
CC=golang-dev
https://golang.org/cl/6535057

Previously we tried to parse email constraints as the maximum base
distance (which is unused and must be omitted according to RFC 5280)
because they share the same tag number. Rather than complicate the
code further, this CL just ignores the unused values.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/6552044

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/6544044

Always process the DWARF info, even when the const value is determined
using the debug data block. This ensures that the injected enum is
removed and future loads of the same constant do not trigger
inconsistent definitions.

Add tests for issues 2470 and 4054.
Fixes #4054.

R=golang-dev, fullung, dave, rsc, minux.ma
CC=golang-dev
https://golang.org/cl/6501101

R=golang-dev, r, minux.ma, dave, bradfitz
CC=golang-dev
https://golang.org/cl/6532052

In a range loop, the presence of a value implies the presence of a key.
However, the presence of a value as an *ast.Ident does not imply that
the key is also an *ast.Ident, thus leading to a panic any time the
two argument form is used where the key is not an identifier.

R=golang-dev, adg, r
CC=golang-dev
https://golang.org/cl/6540045

Previously, an import block such as
	import (
        	"net"

                "stack"
        )
would not permit ":Drop stack" to work because we were aborting
the scan early, which is only correct when Import is in operation.

R=golang-dev, franciscossouza
CC=golang-dev
https://golang.org/cl/6532053