*** 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

(see also issue 3961).

hexdump -c testdata/crlf.input
0000000   /   *  \r  \n  \t   S   o   u   r   c   e       c   o   n   t
0000010   a   i   n   i   n   g       C   R   /   L   F       l   i   n
0000020   e       e   n   d   i   n   g   s   .  \r  \n  \t   T   h   e
0000030       g   o   f   m   t   '   e   d       o   u   t   p   u   t
0000040       m   u   s   t       o   n   l   y       h   a   v   e
0000050   L   F  \r  \n  \t   l   i   n   e       e   n   d   i   n   g
0000060   s   .  \r  \n   *   /  \r  \n   p   a   c   k   a   g   e
0000070   m   a   i   n  \r  \n  \r  \n   f   u   n   c       m   a   i
0000080   n   (   )       {  \r  \n  \t   /   /       l   i   n   e
0000090   c   o   m   m   e   n   t  \r  \n  \t   p   r   i   n   t   l
00000a0   n   (   "   h   e   l   l   o   ,       w   o   r   l   d   !
00000b0   "   )       /   /       a   n   o   t   h   e   r       l   i
00000c0   n   e       c   o   m   m   e   n   t  \r  \n  \t   p   r   i
00000d0   n   t   l   n   (   )  \r  \n   }  \r  \n
00000db

hexdump -c testdata/crlf.golden
0000000   /   *  \n  \t   S   o   u   r   c   e       c   o   n   t   a
0000010   i   n   i   n   g       C   R   /   L   F       l   i   n   e
0000020       e   n   d   i   n   g   s   .  \n  \t   T   h   e       g
0000030   o   f   m   t   '   e   d       o   u   t   p   u   t       m
0000040   u   s   t       o   n   l   y       h   a   v   e       L   F
0000050  \n  \t   l   i   n   e       e   n   d   i   n   g   s   .  \n
0000060   *   /  \n   p   a   c   k   a   g   e       m   a   i   n  \n
0000070  \n   f   u   n   c       m   a   i   n   (   )       {  \n  \t
0000080   /   /       l   i   n   e       c   o   m   m   e   n   t  \n
0000090  \t   p   r   i   n   t   l   n   (   "   h   e   l   l   o   ,
00000a0       w   o   r   l   d   !   "   )       /   /       a   n   o
00000b0   t   h   e   r       l   i   n   e       c   o   m   m   e   n
00000c0   t  \n  \t   p   r   i   n   t   l   n   (   )  \n   }  \n
00000cf

R=rsc
CC=golang-dev
https://golang.org/cl/6526052

Fixes #4100.

R=adg, r, dave
CC=golang-dev
https://golang.org/cl/6535055

we need to restore %PATH% before calling "dist banner", so that
it could suggest the user to add %GOROOT%/bin to %PATH% if necessary.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/6525049

use a function to get stdout and stderr, instead of depending
on a specific libc implementation.
also make test/run.go replace \r\n by \n before comparing
output.

        Fixes #2121.
        Part of issue 1741.

R=alex.brainman, rsc, r, remyoudompheng
CC=golang-dev
https://golang.org/cl/5847068

We use pkg path instead of file name (which contains $WORK) in section symbols names.

R=golang-dev, fullung, rsc, iant
CC=golang-dev
https://golang.org/cl/6445085

Fixes #3767

R=golang-dev, bradfitz, rsc
CC=golang-dev
https://golang.org/cl/6523043

Update to tip (to get 6475062 and 6525047)
Rebuild cmd/api.
Switch to a go1 release branch.
Run go tool api > api/go1.txt.new in release branch.
Back to tip.

R=golang-dev, mikioh.mikioh
CC=golang-dev
https://golang.org/cl/6528047

R=golang-dev, r, bradfitz
CC=golang-dev
https://golang.org/cl/6488127

Fixes writing of function parameter, result lists which
consist of multiple named or unnamed items with same type.

Fixes #4011.

R=golang-dev, bsiegert, bradfitz, rsc
CC=golang-dev
https://golang.org/cl/6475062

R=fullung, r, remyoudompheng, minux.ma, gri, rsc
CC=golang-dev
https://golang.org/cl/6494075

R=gri
CC=golang-dev
https://golang.org/cl/6525046

This is the second part of a bigger change that adds data race detection feature:
https://golang.org/cl/6456044
This change makes the linker emit dependency on runtime/race package when supplied with -b flag.

R=rsc, minux.ma
CC=golang-dev
https://golang.org/cl/6488074

Fixes #4061.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/6525047

This is the first part of a bigger change that adds data race detection feature:
https://golang.org/cl/6456044
Adds -race flag to go command.
API change:
+pkg go/build, type Context struct, InstallTag string

R=rsc
CC=golang-dev
https://golang.org/cl/6488075

This is a part of a bigger change that adds data race detection feature:
https://golang.org/cl/6456044
This change breaks circular dependency between runtime/race and syscall packages.

R=rsc
CC=golang-dev
https://golang.org/cl/6498079

The performance changes will be a few different CLs.
Start with benchmarks as a baseline.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/6537043

R=rsc, dvyukov, dave
CC=golang-dev
https://golang.org/cl/6528043

Function and method calls are valid expression statements,
but calling certain built-in functions is not permitted.
Enumerate the built-ins.

Also: unsafe.Offsetof permits parenthesized selectors as
arguments.

This is simply documenting existing compiler behavior
(both gc and gccgo agree).

R=r, rsc, iant, ken
CC=golang-dev
https://golang.org/cl/6498138

R=rsc
CC=golang-dev
https://golang.org/cl/6527043

Fixes #3942.

R=golang-dev, mike.rosset, r
CC=golang-dev
https://golang.org/cl/6524043

R=r, iant, rogpeppe, bradfitz
CC=golang-dev
https://golang.org/cl/6498078

Fixes #4093.

R=golang-dev, bradfitz, r
CC=golang-dev
https://golang.org/cl/6536047

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/6524045

The change is a preparation for the new scheduler.
It introduces runtime.park() function,
that will atomically unlock the mutex and park the goroutine.
It will allow to remove the racy readyonstop flag
that is difficult to implement w/o the global scheduler mutex.

R=rsc, remyoudompheng, dave
CC=golang-dev
https://golang.org/cl/6501077

Broke TCP selfConnect

««« original CL description
net: avoid nil pointer dereference when RemoteAddr.String method chain is called

Fixes #3721.

R=dave, rsc
CC=golang-dev
https://golang.org/cl/6395055
»»»

R=rsc
CC=golang-dev
https://golang.org/cl/6533043

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/6488122

During interface compare, the operands will be evaluated twice. The operands might include function calls for conversion, so make them cheap before comparing them.

R=rsc
CC=golang-dev
https://golang.org/cl/6498133