Fixes #3325.

R=golang-dev, bradfitz, minux.ma, r
CC=golang-dev
https://golang.org/cl/5858043

They looked out of place in godoc.
Includes documenting sort stability.

Fixes #3356

R=golang-dev, gri, trolleriprofessorn
CC=golang-dev
https://golang.org/cl/5855044

1. make the program go buildable
2. update os.EINVAL and runtime.Cgocalls()
3. wrap mpz_div_2exp() and mpz_mul_2exp to support both
   pre-5.0 and post-5.0 gmp (we really have no reason to
   restrict ourselves to gmp 5.0+)

R=golang-dev, remyoudompheng, iant
CC=golang-dev
https://golang.org/cl/5847061

        Its functionality has been moved into cmd/dist.

R=golang-dev, r, iant
CC=golang-dev
https://golang.org/cl/5843062

This is because we disallow local import for non-local packages, if
GOROOT happens to be under one of GOPATH, then some tests will fail
to build.
Fixes #3337.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5852043

R=adg, lvd
CC=golang-dev
https://golang.org/cl/5845065

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5848066

Fixes build, teaches lesson.

R=golang-dev, r
TBR=bradfitz
CC=golang-dev
https://golang.org/cl/5853051

to bring it in line with text/template's interface.
Fixes #3296.

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5843066

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5843065

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5846071

- use GO_GCFLAGS and GO_LDFLAGS if supplied
- build misc\dashboard\builder and misc\goplay
- run tests in test\bench\go1
- check api compatibility

R=golang-dev, r, kardianos, bradfitz
CC=golang-dev
https://golang.org/cl/5847063

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5846070

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5847070

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5847064

The two optimizations for small structs and arrays
were missing the implicit cast from ideal bool.

Fixes #3351.

R=rsc, lvd
CC=golang-dev
https://golang.org/cl/5848062

If a CertificateRequest is received we have to reply with a
Certificate message, even if we don't have a certificate to offer.

Fixes #3339.

R=golang-dev, r, ality
CC=golang-dev
https://golang.org/cl/5845067

R=adg
CC=golang-dev
https://golang.org/cl/5841050

As discussed on golang-dev, windows will use
"\" as path separator. No escaping allowed.

R=golang-dev, r, mattn.jp, rsc, rogpeppe, bsiegert, r
CC=golang-dev
https://golang.org/cl/5825044

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5846065

It is unprecedented to add tests to package syscall, especially
system-specific ones. Not a policy worth changing right before Go 1
is cut.

The sole existing test, passfd_test.go, contains the line
        // +build linux darwin probablyfreebsd probablyopenbsd
which argues that this is not a subject to be undertaking likely.
Note that passfd_test.go also went in just now. It's the only test
in syscall.

Deleting for now, will reconsider after Go 1.

R=golang-dev, bradfitz, r, dsymonds
CC=golang-dev
https://golang.org/cl/5846063

We can revisit the issue of testing in syscall after Go 1.

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5844057

R=golang-dev, r, r
CC=golang-dev
https://golang.org/cl/5845059

R=bradfitz, iant
CC=golang-dev
https://golang.org/cl/5846059

Updates #1101

R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/5849057

Adds new file api/go1.txt, locking down the current API.
Any changes to the API will need to update that file.

run.bash (but not make.bash, or Windows) will check for
accidental API changes.

R=golang-dev, dsymonds, rsc
CC=golang-dev
https://golang.org/cl/5820070

They have been deleted from package unsafe.
Also delete their appearance in exp/types.

Fixes #3338.

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5847056

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5841054

R=adg, r
CC=golang-dev
https://golang.org/cl/5849052

R=golang-dev, rsc, r, adg, gri, r
CC=golang-dev
https://golang.org/cl/5835046

This makes the last error-reporting CL a bit less
aggressive.  errPrintedOutput is a sentinel value
that should not be wrapped.

R=gri
CC=golang-dev
https://golang.org/cl/5845052

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5841051

R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/5842043

R=golang-dev, alex.brainman, mattn.jp
CC=golang-dev
https://golang.org/cl/5843045

        Fixes part of issue 3253.
        We still need to support scattered relocations though.

R=golang-dev, bsiegert, rsc, iant
CC=golang-dev
https://golang.org/cl/5822050

Fixes #3001.  (This time for sure!)

R=golang-dev, r, fullung
CC=golang-dev
https://golang.org/cl/5845044

Fixes #3330.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5847043

Same fix as applied here: https://golang.org/cl/5761044

Fixes #3222.

R=golang-dev, alex.brainman, rsc
CC=golang-dev
https://golang.org/cl/5838043

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5841044

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5845043