cmd/go: add missing doc for GOOS and GOARCH

LGTM=r
R=golang-codereviews, r
CC=golang-codereviews
https://codereview.appspot.com/133900043

Committer: Rob Pike <r@golang.org>
io: document that Readers and Writers must not retain buffers

There are both many callers and many implementations of these
interfaces, so make the contract explicit. Callers generally
assume this, and at least the standard library and other
implementations obey this, but it's never stated explicitly,
making it somewhat risky to assume.

LGTM=gri, rsc
R=golang-codereviews, gri
CC=golang-codereviews, r, rsc
https://codereview.appspot.com/132150043
net/http: fix data race in test

I can't reproduce the race, but this should fix it.

Fixes Issue 8483

LGTM=dvyukov
R=dvyukov
CC=golang-codereviews
https://codereview.appspot.com/126610043
runtime,sync: Convert procPin and procUnpin functions to Go.

LGTM=dvyukov
R=golang-codereviews, dvyukov
CC=golang-codereviews, khr
https://codereview.appspot.com/132880043

Committer: Dmitriy Vyukov <dvyukov@google.com>
runtime: convert int64tofloat64, uint64tofloat64 to Go

I noticed that 5g doesn't flush the float64 result back to the stack, hence the change in the function signature. I'm wondering if I should also change the signature for the other two functions.

LGTM=rsc
R=minux, josharian, rsc
CC=golang-codereviews
https://codereview.appspot.com/132990044
runtime: convert Stack to Go.

LGTM=khr
R=khr, josharian
CC=golang-codereviews
https://codereview.appspot.com/129510043
doc/cmd.html: close a tag.

LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://codereview.appspot.com/130560043

Committer: Brad Fitzpatrick <bradfitz@golang.org>
runtime: name hi and lo parts of ret in assembly

Makes vet happy.

LGTM=bradfitz
R=dvyukov, bradfitz
CC=golang-codereviews
https://codereview.appspot.com/131320043
A+C: Joe Shaw (individual CLA)

Generated by a+c.

R=gobot
CC=golang-codereviews
https://codereview.appspot.com/133040043
unicode: use go generate instead of make to create tables.go

LGTM=mpvl, rsc
R=mpvl, rsc
CC=golang-codereviews
https://codereview.appspot.com/135820043
time: use go generate rather than Makefile (windows only)
Also make genzabbrs.go more self-contained.
Also run it (on Linux; does that matter?) to update the table.

LGTM=rsc
R=rsc, alex.brainman
CC=golang-codereviews
https://codereview.appspot.com/128350044