cmd/5g, cmd/6g, cmd/8g: fix comment

Keeping the string "compactframe" because that's what
I always search for to find this code. But point to the real place too.

TBR=iant
CC=golang-dev
https://codereview.appspot.com/10676047
include/plan9: define size_t to fix build breakage

R=golang-dev, bradfitz
CC=golang-dev
https://codereview.appspot.com/10760043
net/smtp: preserve Auth errors

If authentication failed, the initial error was being thrown away.

Fixes issue 5700.

R=golang-dev, bradfitz
CC=golang-dev
https://codereview.appspot.com/10744043

Committer: Brad Fitzpatrick <bradfitz@golang.org>
net/http: fix memory leak in Transport

Fixes issue 5794

R=golang-dev, r
CC=golang-dev
https://codereview.appspot.com/10747044
runtime: shorten hash lookup stack frames

On amd64 the frames are very close to the limit for a
nosplit (textflag 7) function, in part because the C compiler
does not make any attempt to reclaim space allocated for
completely registerized variables. Avoid a few short-lived
variables to reclaim two words.

R=golang-dev, r
CC=golang-dev
https://codereview.appspot.com/10758043
test: match gccgo error strings.

R=golang-dev, iant
CC=golang-dev
https://codereview.appspot.com/10741043
cmd/gc: fix missing export data for inlining in a few other cases.

Exported inlined functions that perform a string conversion
using a non-exported named type may miss it in export data.

Fixes issue 5755.

R=rsc, golang-dev, ality, r
CC=golang-dev
https://codereview.appspot.com/10464043