cmd/gc: Give better line numbers for errors in composite literals.

Credit to Russ for suggesting this fix.

Fixes issue 3925.

R=golang-dev, franciscossouza, rsc
CC=golang-dev
https://codereview.appspot.com/6920051
doc/gopher: add high-resolution pencil sketches
These are higher-resolution scans of the little
drawings used as clip art on golang.org

R=bradfitz, rsc
CC=golang-dev
https://codereview.appspot.com/6929058
spec: index and array/slice size constants must fit into an int

R=r, rsc, iant, ken
CC=golang-dev
https://codereview.appspot.com/6903048
net/http: follow certain redirects after POST requests

Fixes issue 4145

R=golang-dev, rsc
CC=golang-dev
https://codereview.appspot.com/6923055
misc/dashboard: don't email about netbsd failures

Too flaky.

R=iant, rsc
CC=golang-dev
https://codereview.appspot.com/6925056
net/http: remove a stale cookie TODO comment, add a test

Fixes issue 4528

R=golang-dev, rsc
CC=golang-dev
https://codereview.appspot.com/6922054
net/http: return nicer error when Client request Host is blank

Update issue 4271

R=golang-dev, rsc
CC=golang-dev
https://codereview.appspot.com/6931052
spec: calling delete on a nil map is a no-op

This is language change. It is a backward-compatible
change but for code that relies on a run-time panic
when calling delete on a nil map (unlikely).

Fixes issue 4253.

R=rsc, r, iant, ken, bradfitz, rogpeppe
CC=golang-dev
https://codereview.appspot.com/6909060
spec: more explicit comments for constant expression examples

Fixes issue 3814.

R=rsc, iant
CC=golang-dev
https://codereview.appspot.com/6920057
doc/play: sync playground.js with go-playground repo

Also add style for "Program exited." message.

R=golang-dev, bradfitz
CC=golang-dev
https://codereview.appspot.com/6934047
go/doc: hide "Program exited." message from front page playground output

R=golang-dev, bradfitz
CC=golang-dev
https://codereview.appspot.com/6934049
log/syslog: fix flakey test on slow hosts

Fixes issue 4467.

The syslog tests can fail if the timeout fires before the data arrives at the mock server. Moving the timeout onto the goroutine that is calling ReadFrom() and always processing the data returned before handling the error should improve the reliability of the test.

R=golang-dev, bradfitz
CC=golang-dev
https://codereview.appspot.com/6920047
A+C: James David Chalfant (individual CLA)

Generated by addca.

R=gobot
CC=golang-dev
https://codereview.appspot.com/6939043
    database/sql: Alter *DB.begin to return driver.ErrBadConn when driver.Conn.Begin returns driver.ErrBadConn
Fixes issue 4433

R=golang-dev, bradfitz
CC=golang-dev
https://codereview.appspot.com/6845094

Committer: Brad Fitzpatrick <bradfitz@golang.org>
runtime/race: fix test for GOMAXPROCS>1

Fixes issue 4530.

R=dvyukov, dave
CC=golang-dev
https://codereview.appspot.com/6933052

Committer: Dmitriy Vyukov <dvyukov@google.com>
net: make TestDialTimeoutFDLeak a bit robust

TestDialTimeoutFDLeak will fail when system state somaxconn is
greater than expected fixed value.

Fixes issue 4384 (again).

R=fullung, dave, rsc
CC=golang-dev
https://codereview.appspot.com/6873069
io: SectionReader.ReadAt should return EOF when buf is not fully read
Fixes issue 4392.

R=golang-dev, rsc
CC=golang-dev
https://codereview.appspot.com/6858062
lib/godoc/example.html: htmlify the play code
Fixes issue 4539.

R=golang-dev, dsymonds
CC=golang-dev
https://codereview.appspot.com/6942043