cc: add #pragma textflag to set it
runtime: mark mheap to go into noptr-bss.
        remove special case in garbage collector

Remove the ARM from.flag field created by CL 5687044.
The DUPOK flag was already in p->reg, so keep using that.

Otherwise test/nilptr.go creates a very large binary.
Should fix the arm build.
Diagnosed by minux.ma; replacement for CL 5690044.

R=golang-dev, minux.ma, r
CC=golang-dev
https://golang.org/cl/5686060

Or, depending on your point of view, make the
comparisons satisfy any surrounding boolean type.

Also, fix a few foo_bar -> fooBar in code fragments.

Fixes #2561.

R=golang-dev, r, bradfitz, gri, iant, kevlar
CC=golang-dev
https://golang.org/cl/5671096

Fixes #3096.

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5690063

R=mikioh.mikioh, rsc
CC=golang-dev
https://golang.org/cl/5690062

R=gri, dsymonds
CC=golang-dev
https://golang.org/cl/5687071

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5688063

Accept certain non-compliant response headers
(in particular, when spaces preceed the colon).
All major browser and curl seem to support this,
and at least one webserver seems to send these.

*shrug*

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/5690059

R=golang-dev, rsc
CC=golang-dev, remy
https://golang.org/cl/5688057

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/5685070

R=rsc, r
CC=golang-dev
https://golang.org/cl/5685069

R=ajstarks, r
CC=golang-dev
https://golang.org/cl/5687070

R=bradfitz
CC=golang-dev
https://golang.org/cl/5690058

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5689056

When installing pprof into the tools directory, it needs to
have execute permissions on unix-like systems.

Fixes issues 3077.

R=golang-dev, rsc, minux.ma
CC=golang-dev
https://golang.org/cl/5675095

Before we were using "ESMTP" in the banner as a clue,
but that is not required by the RFC and breaks mailing
to smtp.yandex.ru.

Fixes #3045.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5687066

A fault during malloc might lead to the program's
first call to findfunc, which would in turn call malloc.
Don't do that.

Fixes #1777.

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/5689047

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5689063

R=golang-dev, minux.ma, rsc
CC=golang-dev
https://golang.org/cl/5686058

R=golang-dev, rsc, r, r
CC=golang-dev
https://golang.org/cl/5673093

Without -d, bison doesn't generate y.tab.h.

R=rsc
CC=golang-dev
https://golang.org/cl/5685065

by other low-level libraries, like collate.  Extra care has been given to optimize the performance
of normalizing to NFD, as this is what will be used by the collator.  The overhead of checking
whether a string is normalized vs simply decomposing a string is neglible.  Assuming that most
strings are in the FCD form, this iterator can be used to decompose strings and normalize with
minimal overhead.

R=r
CC=golang-dev
https://golang.org/cl/5676057

The supposedly overflowing variable was registerized.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5687061

Also cleanup the resolveName method.

Fixes failure on go/build declaration:
        var ToolDir = filepath.Join(...)

R=golang-dev, bradfitz
CC=golang-dev, remy
https://golang.org/cl/5681043

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5686053

Awfulness by the bucket that we hope
Fixes #3057.

R=golang-dev, mikioh.mikioh, dsymonds, r, rsc
CC=golang-dev
https://golang.org/cl/5687060

TBR=bradfitz

R=golang-dev
CC=golang-dev
https://golang.org/cl/5684050

Such variables would be put at 0(SP), leading to serious
corruptions at zero initialization.
Fixes #3084.

R=golang-dev, r
CC=golang-dev, remy
https://golang.org/cl/5683052

TBR=dsymonds

R=dsymonds
CC=golang-dev
https://golang.org/cl/5687058

Part of diagnosing the selfConnect bug
TBR=dsymonds

R=golang-dev
CC=golang-dev
https://golang.org/cl/5687057

TBR=dsymonds

R=golang-dev
CC=golang-dev
https://golang.org/cl/5683057

This doesn't run all ~750 of the tests, but most.

Progress on issue 2833

R=golang-dev, ality, rsc, r, r
CC=golang-dev
https://golang.org/cl/5625044

Fixes #3051.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5683056

Use methods for key questions.
Provide access to non-portable pieces through portable methods.
Windows and Plan 9 updated.

R=golang-dev, bradfitz, bradfitz, r, dsymonds, rsc, iant, iant
CC=golang-dev
https://golang.org/cl/5673077

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/5686049

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5685061

Fixes #2935.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5684048

Fixes #2777

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5685060

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5688047

R=rsc, mikioh.mikioh
CC=golang-dev
https://golang.org/cl/5689046

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5687052