Fixes #1614.

R=gri
CC=golang-dev
https://golang.org/cl/4290054

R=rsc
CC=golang-dev
https://golang.org/cl/3559041

- just an oversight; we were reallocating a buffer.
- use unsafe to avoid allocating storage for a string twice.

R=rsc
CC=golang-dev
https://golang.org/cl/4290056

R=dsymonds
CC=golang-dev
https://golang.org/cl/4291052

R=golang-dev, niemeyer, rsc1, rog, rsc
CC=golang-dev
https://golang.org/cl/4285047

R=r
CC=golang-dev
https://golang.org/cl/4248066

R=rsc, niemeyer, r2, rog, iant2, r
CC=golang-dev
https://golang.org/cl/4235060

R=r
CC=golang-dev
https://golang.org/cl/4272058

Permit system calls to be designated as non-blocking, meaning
that we simply call them without involving the scheduler.

This change by itself is mostly performance neutral.  In
combination with a following change to the net package there
is a performance advantage.

R=rsc, dfc, r2, iant2, rsc1
CC=golang-dev
https://golang.org/cl/4278055

R=ken2
CC=golang-dev
https://golang.org/cl/4278056

- use enc.err and dec.err instead of return values in deferred error catcher
- replace io.WriteString with buffer.WriteString

now at:
mallocs per encode of type Bench: 7
mallocs per decode of type Bench: 8

R=rsc
CC=golang-dev
https://golang.org/cl/4277057

R=brainman, rsc, rsc1
CC=golang-dev
https://golang.org/cl/4249064

R=rsc
CC=golang-dev
https://golang.org/cl/4271048

gobuilder: recognize CLs of the form weekly.DATE

R=rsc, r
CC=golang-dev
https://golang.org/cl/4282052

This just returns a ClientConn suitable for writing
proxy requests.  To be used in Transport.

R=rsc, petar-m
CC=golang-dev
https://golang.org/cl/4290052

(per rsc's suggestion)

R=rsc
CC=golang-dev
https://golang.org/cl/4276057

R=gri
CC=golang-dev
https://golang.org/cl/4280048

The -test.run and -test.bench flags were compilng the regexp for ever test
function, which was mucking up memory profiles.   Add a simple wrapper
to save the compiled state so that the regexp is compiled only once for
each flag.

R=rsc
CC=golang-dev
https://golang.org/cl/4274063

Dependency on bufio crept in during last CL; this breaks the cycle.
Also add a missing '-' to the documentation.

R=rsc
CC=golang-dev
https://golang.org/cl/4274061

These allow a test to generate memory profiles automatically.

R=golang-dev, rsc1
CC=golang-dev
https://golang.org/cl/4273064

R=bradfitzgo, nsz
CC=golang-dev
https://golang.org/cl/4280041

There is some disagreement about how to deal with hash values larger
than the curve order size. We choose to follow OpenSSL's lead here.

R=bradfitzgo, r
CC=golang-dev
https://golang.org/cl/4273059

R=r
CC=golang-dev
https://golang.org/cl/4281052

R=r
CC=golang-dev
https://golang.org/cl/4289048

R=r
CC=golang-dev
https://golang.org/cl/4272052

Avoids 3 mallocs in a round trip encoding/decoding a struct.

R=rsc, rsc1
CC=golang-dev
https://golang.org/cl/4278052

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/4290049

R=adg
CC=golang-dev
https://golang.org/cl/4275054

R=adg
CC=golang-dev
https://golang.org/cl/4274059

If braces don't have position information for a composite
literal, don't assume alignment of key:value pairs under
the (wrong) assumption that there may be multiple lines.

R=rsc
CC=golang-dev
https://golang.org/cl/4297043

Add malloc counts for encode and decode.

R=rsc
CC=golang-dev
https://golang.org/cl/4290048

R=r
CC=golang-dev
https://golang.org/cl/4273060

R=rsc, dsymonds
CC=golang-dev
https://golang.org/cl/4290047

On my mac:
mallocs per rpc round trip: 144
rpc.BenchmarkEndToEnd	   10000	    228244 ns/op

Room for improvement.

R=rsc
CC=golang-dev
https://golang.org/cl/4274058

This makes it possible to build Windows binaries on non-Windows OSes.

R=golang-dev, rsc1, rsc
CC=golang-dev
https://golang.org/cl/4271046

The Windows code is untested.

R=rsc, gri, brainman, rsc1
CC=golang-dev
https://golang.org/cl/4253052

R=bradfitzgo, dsymonds, r, gri, adg
CC=golang-dev
https://golang.org/cl/4282044

R=ken2
CC=golang-dev
https://golang.org/cl/4287047

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/4274052

Swapping the goroutines lets them reuse the
communication completion on v instead of
needing a second channel (done).

R=gri
CC=golang-dev
https://golang.org/cl/4287045