This time for sure.
Runs all tests.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5752060

R=rsc
CC=golang-dev
https://golang.org/cl/5758057

This moves the various CA root fetchers from crypto/tls into crypto/x509.

The move was brought about by issue 2997. Windows doesn't ship with all
its root certificates, but will instead download them as-needed when using
CryptoAPI for certificate verification.

This CL changes crypto/x509 to verify a certificate using the system root
CAs when VerifyOptions.RootCAs == nil. On Windows, this verification is
now implemented using Windows's CryptoAPI. All other root fetchers are
unchanged, and still use Go's own verification code.

The CL also fixes the hostname matching logic in crypto/tls/tls.go, in
order to be able to test whether hostname mismatches are honored by the
Windows verification code.

The move to crypto/x509 also allows other packages to use the OS-provided
root certificates, instead of hiding them inside the crypto/tls package.

Fixes #2997.

R=agl, golang-dev, alex.brainman, rsc, mikkel
CC=golang-dev
https://golang.org/cl/5700087

The compiler must be changed with the Set method
so that the buildToolchain gets updated too.

Fixes #3231.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5768044

The old way to find a port was to listen :0 and then
look at what port it picked, close the listener, and then
immediately try to listen on that port.

On some Windows 7 machines that sequence fails at
the second listen, because the first one is still lingering
in the TCP/IP stack somewhere.  (Ironically, most of these
are used in tests of a "second listen", which in this case
ends up being the third listen.)

Instead of this race, just return the listener from the
function, replacing usableLocalPort+Listen with
usableListenPort.

Fixes #3219.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5769045

Forgot this half in https://golang.org/cl/5764044

R=gri
CC=golang-dev
https://golang.org/cl/5770044

Fixes #3234.

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/5756078

Fixes #3203.

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/5769043

Goroutines are no longer excluded from init.

Fixes #3232.

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/5764044

Fixes #3222.

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/5761044

Fixes #3230.

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/5753071

The gccgo compiler incorrectly gave an error for this code.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5767043

R=ken2
CC=golang-dev
https://golang.org/cl/5752073

Does not actually test so files.

««« original CL description
misc/cgo: re-enable testso

Also enabled it for darwin.

R=rsc
CC=golang-dev
https://golang.org/cl/5754063

»»»

R=golang-dev, minux.ma, r, f
CC=golang-dev
https://golang.org/cl/5756075

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5757060

Fixes #3143.

R=ken2
CC=golang-dev
https://golang.org/cl/5752070

Let the outer environment filter down to the commands being run.

TBR=r
CC=golang-dev
https://golang.org/cl/5758066

Fixes #3146.

R=ken2
CC=golang-dev
https://golang.org/cl/5756074

Lets us run multifile tests and tests with arguments.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5753068

go get code.google.com/p/gowingui

R=golang-dev, minux.ma, r
CC=golang-dev
https://golang.org/cl/5752067

        Fixes #3190.

R=rsc, tjyang2001, rsc
CC=golang-dev
https://golang.org/cl/5759056

        find() returns -1 when not found.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5752068

R=golang-dev, minux.ma, rsc
CC=golang-dev
https://golang.org/cl/5757059

Fixes #3226.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5756073

I don't know what's out there, but something
is answering to 127.0.71.111:80 on our builder,
so use a different port.

Also insert a check that the dial fails, which
would have diagnosed this problem.

Fixes #3016.

R=golang-dev, mikioh.mikioh, r
CC=golang-dev
https://golang.org/cl/5754062

Also enabled it for darwin.

R=rsc
CC=golang-dev
https://golang.org/cl/5754063

I don't know enough about multicast.
Should this be disabled on all systems, not just Windows?

R=golang-dev
CC=golang-dev
https://golang.org/cl/5754060

$ go run
go run: no go files listed
$ go run ../../pkg/math/bits.go
go run: cannot run non-main package
$

Fixes #3168.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5755064

R=rsc
CC=golang-dev
https://golang.org/cl/5753054

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5757050

The last CL forgot the all-important 'backdoor' package.
Cgo-using packages compile .c files with gcc, but we want
to compile this one with 6c, so put it in a non-cgo package.

TBR=golang-dev
CC=golang-dev
https://golang.org/cl/5758063

By default the all.bash tests must not ever announce
on an external address.  It's not just an OS X issue.

R=golang-dev, mikioh.mikioh
CC=golang-dev
https://golang.org/cl/5753067

About 10% for hello, world.
Maybe more reductions will come.
Also clarify that we're comparing printf against Printf
(gcc can optimize aggressively, making this a different
sort of comparison).

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5756070

The testso directory still needs to be enabled.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5731048

$ go list -f '{{.ImportPath}} {{.Deps}}' fmt log
fmt [errors io math os reflect runtime strconv sync sync/atomic syscall time unicode/utf8 unsafe]
log [errors fmt io math os reflect runtime strconv sync sync/atomic syscall time unicode/utf8 unsafe]

R=bradfitz, rogpeppe, r, r, rsc
CC=golang-dev
https://golang.org/cl/5753055

We can write syslist.go by hand.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5757057

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5752066

R=golang-dev, bradfitz, alex.brainman
CC=golang-dev
https://golang.org/cl/5757058

There are a few more but these are the easiest ones.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5756067

We need a compact, reasonably efficient IsPrint. That adds about 2K of data,
plus a modest amount of code, but now strconv is a near-leaf package.

R=r, bradfitz, adg, rsc, minux.ma
CC=golang-dev
https://golang.org/cl/5756050