runtime: fix build on openbsd/386

R=golang-dev, minux.ma, r
CC=golang-dev
https://codereview.appspot.com/8569043

Committer: Rob Pike <r@golang.org>
cmd/ld: ignore PE sections that are not code or data

Update issue 5106
Update issue 5273

R=minux.ma, r
CC=golang-dev
https://codereview.appspot.com/8715043
test/stress: start of a runtime stress program

Runs forever, stressing the runtime in various ways.

It should never terminate.

R=golang-dev, r, minux.ma
CC=golang-dev
https://codereview.appspot.com/8583047
net/http/cookiejar: mention go.net/publicsuffix.

R=golang-dev, r, gary.burd, dr.volker.dobler
CC=golang-dev
https://codereview.appspot.com/8660046