After a prefix match, the old code advanced the length of the
prefix.  This is incorrect since the full match might begin
in the middle of the prefix. (Consider "aaaab+" matching
"aaaaaab").

Fixes #1373

R=rsc
CC=golang-dev
https://golang.org/cl/3795044

The bug was that for an anchored pattern such as ^x, the prefix
scan ignored the anchor, and could scan the whole file if there was
no x present.  The fix is to do prefix matching after the anchor;
the cost miniscule; the speedups huge.

R=rsc, gri
CC=golang-dev
https://golang.org/cl/3837042

	This is really insignificant, but it might as well be fixed.

R=golang-dev, brainman
CC=golang-dev
https://golang.org/cl/3832045

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/3827042

R=golang-dev, gri
CC=binet, golang-dev
https://golang.org/cl/3782044

I messed up when reading the OCFB spec.

TBR=rsc

R=rsc
CC=golang-dev
https://golang.org/cl/3739042

goinstall/download.go: Add checkout concept and helper functions to clean and fix implementation (Issue 1265)

R=rsc, niemeyer, adg
CC=golang-dev
https://golang.org/cl/3536041

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/3824043

R=rsc, iant2, iant
CC=golang-dev
https://golang.org/cl/3802044

R=r
CC=golang-dev
https://golang.org/cl/3799045

R=r
CC=golang-dev
https://golang.org/cl/3809042

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/3831041

R=agl1
CC=golang-dev
https://golang.org/cl/3772043

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/3779043

Fixes #1357.

R=adg, gri
CC=golang-dev
https://golang.org/cl/3809041

R=adg
CC=golang-dev
https://golang.org/cl/3797041

Implementation uses fast suffixarray lookup to find
initial matches if the regular expression starts with
a suitable prefix without meta characters.

R=r, rsc
CC=golang-dev
https://golang.org/cl/3720042

	    relative to the source file directory

R=r, rsc
CC=golang-dev
https://golang.org/cl/3752041

R=agl, agl1, rsc
CC=golang-dev
https://golang.org/cl/3753041

R=rsc
CC=golang-dev
https://golang.org/cl/3751041

R=r
CC=golang-dev
https://golang.org/cl/3750041

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