Factored the error synchronization code into two functions
syncStmt and syncDecl. Because they may return w/o advancing
the scanner, there is potential for endless loops across
multiple parse functions; typically caused by an incorrect
token list in these functions (e.g., adding token.ELSE to
syncStmt will cause the parser to go into an endless loop
for test/syntax/semi7.go without this mechanism). This would
indicate a compiler bug, exposed only in an error situation
for very specific source files. Added a mechanism to force
scanner advance if an endless loop is detected. As a result,
error recovery will be less good in those cases, but the parser
reported a source error already and at least doesn't get stuck.

R=rsc, rsc
CC=golang-dev
https://golang.org/cl/5784046

Fixes #3239.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5782049

Fixes #2912.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5783048

The spec is looser than the current implementation.
The spec edit was made in CL 4444050 (May 2011)
but I never implemented it.

Fixes #3244.

R=ken2
CC=golang-dev
https://golang.org/cl/5785049

Fixes #3152.

R=golang-dev, dsymonds, r
CC=golang-dev
https://golang.org/cl/5786047

R=golang-dev, nigeltao
CC=golang-dev
https://golang.org/cl/5758047

Also rename it to test.bash, for naming consistency.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5784045

R=ken2
CC=golang-dev
https://golang.org/cl/5783047

.syso files are system objects copied directly
into the package archive.

Fixes #1552.

R=alex.brainman, iant, r, minux.ma, remyoudompheng
CC=golang-dev
https://golang.org/cl/5778043

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5752049

R=adg, bradfitz
CC=golang-dev
https://golang.org/cl/5787048

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5787045

R=golang-dev, r, jdpoirier
CC=golang-dev
https://golang.org/cl/5762045

R=r
CC=golang-dev
https://golang.org/cl/5752072

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5756049

        Updates #2982.

R=rsc, rsc
CC=golang-dev
https://golang.org/cl/5759064

Fixes #3228.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5784044

Fixes #3175.

R=golang-dev, iant, rsc, r
CC=golang-dev
https://golang.org/cl/5758069

FreeBSD, alone among our supported operating systems,
required that usleep not be interrupted.  Don't require that.

Fixes #3217.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5781045

gofmt reports now a single, accurate error for
the test case of issue 3106.

Also: Added test harness for general error
checking and two test cases for now.

Fixes #3106.

R=rsc, bradfitz
CC=golang-dev
https://golang.org/cl/5755062

        They can start execution even before all init functions end.

R=rsc, r, adg
CC=golang-dev
https://golang.org/cl/5732061

Fixes #1599.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5777043

I am not sure why RunTests and RunExamples are
exported, but I assume that because they are we
should not change the signature, so I added an
unexported global shared by Main and RunTests.

Fixes #3237.

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/5779043

If it didn't reach the limit, we can try extending the arena
before resorting to random memory mappings and praying for the
kernel to be kind.

Fixes #3173.

R=rsc, rsc
CC=golang-dev
https://golang.org/cl/5725045

R=golang-dev, gri, rsc
CC=golang-dev
https://golang.org/cl/5769044

This change is necessary to make the run shell script work
again, but it is not sufficient as bug424.go's execution line
does not name the package that it imports.

R=golang-dev, gri, rsc
CC=golang-dev
https://golang.org/cl/5771043

Fixes #3206.

R=golang-dev, gri, bradfitz
CC=golang-dev
https://golang.org/cl/5769046

Updates #1599

R=golang-dev, gri, rsc
CC=golang-dev
https://golang.org/cl/5774043

Allows the Windows part of CL 5700087 to land.

I had build tested CL 5753060 (which allows
crypto/x509 to use cgo and io/ioutil), and
didn't spot any errors on Windows.

Turns out I was wrong.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5753065

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