Fixes #1334.

R=r
CC=golang-dev
https://golang.org/cl/3746041

It reports whether a regular expression has operators
as opposed to matching literal text.

R=rsc, gri
CC=golang-dev
https://golang.org/cl/3731041

Makes 6l work better on OS X 10.5.

Fixes #1352.
Fixes #1353.

R=r
CC=golang-dev
https://golang.org/cl/3661042

R=r, r2
CC=golang-dev
https://golang.org/cl/3710042

#pragma dynexport is no longer needed for
this use of cgo, since the gcc and gc code are
now linked together into the same binary.
It may still be necessary later.

On the Mac, you cannot use the GOT to resolve
symbols that exist in the current binary, so 6l and 8l
translate the GOT-loading mov instructions into lea
instructions.

On ELF systems, we could use the GOT for those
symbols, but for consistency 6l and 8l apply the
same translation.

The translation is sketchy in the extreme
(depending on the relocation being in a mov
instruction) but it verifies that the instruction
is a mov before rewriting it to lea.

Also makes typedefs global across files.

Fixes #1335.
Fixes #1345.

R=iant, r
CC=golang-dev
https://golang.org/cl/3650042

R=agl1, rsc
CC=golang-dev
https://golang.org/cl/3730041

The former is a boolean function to test whether a string
contains a regular expression metacharacter; the second
returns the string used to compile the regexp.

R=gri, rsc
CC=golang-dev
https://golang.org/cl/3728041

R=rsc
CC=golang-dev
https://golang.org/cl/3674043

(ECDHE is "Elliptic Curve Diffie Hellman Ephemeral")

R=rsc
CC=golang-dev
https://golang.org/cl/3668042

R=gri, rsc
CC=golang-dev
https://golang.org/cl/3719042

        This is a prerequisite to ECDHE support in crypto/tls.

R=r, rsc
CC=golang-dev
https://golang.org/cl/3685043

The other operating systems already ignore write failures.

Fixes #1279.

R=r, r2
CC=golang-dev
https://golang.org/cl/3723041

R=rsc
CC=golang-dev
https://golang.org/cl/3634042

R=r, r2
CC=golang-dev
https://golang.org/cl/3712041

This support code helps in generating the handshake scripts
which are used for testing.

R=rsc, ality
CC=golang-dev
https://golang.org/cl/3680041

It was only used by exp/4s, and even if it is general purpose, I think
it belongs in a graphics library atop exp/draw, not in exp/draw itself.

R=rsc
CC=golang-dev
https://golang.org/cl/3705041

R=rsc
CC=golang-dev
https://golang.org/cl/3709041

R=rsc
CC=golang-dev
https://golang.org/cl/3690042

R=adg
CC=golang-dev
https://golang.org/cl/3708041

R=r
CC=golang-dev
https://golang.org/cl/3707041

R=rsc, r2
CC=golang-dev
https://golang.org/cl/3683042

R=rsc
CC=golang-dev
https://golang.org/cl/3646043

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/3691042

R=rsc
CC=golang-dev
https://golang.org/cl/3702041

Fixes #1344.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/3584042

R=r
CC=golang-dev
https://golang.org/cl/3701041

R=iant, r
CC=dho, golang-dev
https://golang.org/cl/3687041

R=rsc
CC=golang-dev
https://golang.org/cl/3685041

This makes some subtle code easier to understand.

R=rsc
CC=golang-dev
https://golang.org/cl/3444043

This is largely based on ality's CL 2747042.

crypto/rc4: API break in order to conform to crypto/cipher's
Stream interface

cipher/cipher: promote to the default build

Since CBC differs between TLS 1.0 and 1.1, we downgrade and
support only 1.0 at the current time. 1.0 is what most of the
world uses.

Given this CL, it would be trival to add support for AES 256,
SHA 256 etc, but I haven't in order to keep the change smaller.

R=rsc
CC=ality, golang-dev
https://golang.org/cl/3659041

This prevents status messages from filling the
screen when using a command like 'hg log | less'.

R=rsc
CC=golang-dev
https://golang.org/cl/3666042

The recent linker changes broke NaCl support
a month ago, and there are no known users of it.

The NaCl code can always be recovered from the
repository history.

R=adg, r
CC=golang-dev
https://golang.org/cl/3671042

- Skip the gccgo tests if we don't have it
- Add -lm so nbody.c will compile
- Pass 2098 to the meteor test (cf. the shootout site)

R=rsc, r, iant
CC=golang-dev
https://golang.org/cl/3619042

R=rsc
CC=golang-dev
https://golang.org/cl/3477041

R=r
CC=golang-dev
https://golang.org/cl/3642041

R=gri
CC=golang-dev
https://golang.org/cl/3652041

Fixes #1314.

R=adg, rsc
CC=golang-dev
https://golang.org/cl/3459043

R=gri
CC=golang-dev
https://golang.org/cl/3571043

Fixes a bug reported on golang-nuts.

R=rsc, adg
CC=golang-dev
https://golang.org/cl/3641042

R=r, rsc
CC=golang-dev
https://golang.org/cl/3578041