The vi bundled with OS X has a weird bug in that if you turn off
filetype in .vimrc when it's not turned on, even a clean exit of
vi will return 1 which breaks almost everything.

While we're at it, add hint to change $GOROOT to its actual value
in .vimrc.

Fixes #7865.

LGTM=robert.hencke, dsymonds
R=golang-codereviews, robert.hencke, gobot, dsymonds
CC=golang-codereviews
https://golang.org/cl/96800046

Use a real type for Gs instead of scanning them conservatively.
Zero the schedlink pointer when it is dead.

Update #7820

LGTM=rsc
R=rsc, dvyukov
CC=golang-codereviews
https://golang.org/cl/89360043

LGTM=rsc
R=golang-codereviews, adonovan, rsc
CC=golang-codereviews
https://golang.org/cl/90440043

Oddly, 404s with the trailing slash.

LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/90790045

LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/98740046

LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/90810045

Update #7645

LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/98790044

LGTM=iant
R=golang-codereviews, iant
CC=golang-codereviews
https://golang.org/cl/98740045

LGTM=r
R=r
CC=golang-codereviews
https://golang.org/cl/91770050

LGTM=iant
R=golang-codereviews, iant
CC=golang-codereviews
https://golang.org/cl/91860043

For the gc compiler the Go function Issue7695 is defined in
runtime.c, but there is no way to do that for gccgo, because
there is no way to get the correct pkgpath.  The test is not
important for gccgo in any case.

LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/93870044

Previously we used strndup(3) to implement C.CString for gccgo. This
is wrong because strndup assumes the string to be null terminated,
and stops at the first null terminator. Instead, use malloc
and memmove to create a copy of the string, as we do in the
gc implementation.

LGTM=iant
R=iant
CC=golang-codereviews
https://golang.org/cl/96790047

A very smart developer at Gophercon just asked me to help debug
a problem and I was horrified to learn that he was using httputil's
ClientConn. I forgot ClientConn and ServerConn were even included
in Go 1! They should've been deleted.

Scare people away from using them. The net/http package does
not use them and they're unused, unmaintained and untouched in
4+ years.

LGTM=r
R=r, adg
CC=golang-codereviews
https://golang.org/cl/92790043

Remove an RUnlock of syscall.ForkLock with no matching RLock.
Holding ForkLock in netFD.dup is unnecessary: dupCloseOnExecOld
locks and unlocks the lock on its own and dupCloseOnExec doesn't
need the ForkLock to be held.

LGTM=iant
R=golang-codereviews, bradfitz, iant
CC=golang-codereviews
https://golang.org/cl/99800044

Previously Read wouldn't return once its internal input buffer
is filled with non-data bytes.
Fixes #7875.

LGTM=iant
R=golang-codereviews, iant
CC=golang-codereviews
https://golang.org/cl/90820043

LGTM=iant
R=golang-codereviews, iant
CC=golang-codereviews
https://golang.org/cl/96850043

Fixes #7812

LGTM=josharian, iant
R=rsc, iant, adg, ruiu, minux.ma, josharian
CC=golang-codereviews
https://golang.org/cl/89900044

Fixes #7741.

LGTM=r
R=golang-codereviews, r
CC=golang-codereviews
https://golang.org/cl/96830044

The instructions in this document are useful but not reliable.
Explain the situation up top.

Fixes #7471.

LGTM=josharian, iant
R=golang-codereviews, josharian, iant
CC=golang-codereviews
https://golang.org/cl/96830045

(from the discussions on CL 89650044)

LGTM=minux.ma, iant
R=iant, minux.ma
CC=golang-codereviews
https://golang.org/cl/97770043

Fixes #7869

LGTM=dsymonds
R=golang-codereviews
CC=adg, dsymonds, golang-codereviews, rsc
https://golang.org/cl/91770048

Fixes #7645

LGTM=iant, bradfitz
R=iant, bradfitz
CC=golang-codereviews
https://golang.org/cl/90170046

Fixes #7844.

LGTM=crawshaw
R=golang-codereviews, crawshaw
CC=golang-codereviews
https://golang.org/cl/90620045

I fixed this data race regression in two ways: in net/http itself, and also
partially reverting the change from https://golang.org/cl/77580046 .
Previously a Read from a strings.Reader or bytes.Reader returning 0 bytes
would not be a memory write. After 77580046 it was. This reverts that back
in case others depended on that. Also adds tests.

Fixes #7856

LGTM=ruiu, iant
R=iant, ruiu
CC=golang-codereviews, gri
https://golang.org/cl/94740044

LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/93750043

Godoc makes it look better this way; before, it all ran together into nonsense.

LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/90400045

Work around buggy(?) Linux /proc filesystem.

Fixes #7808

LGTM=iant
R=golang-codereviews, iant
CC=adg, golang-codereviews
https://golang.org/cl/90400044

Previously it would panic because of out-of-bound access
if s1 is longer than s2.

LGTM=iant
R=golang-codereviews, iant
CC=golang-codereviews
https://golang.org/cl/90110043

Fixes #7814.

LGTM=agl, adonovan
R=agl, adonovan
CC=golang-codereviews
https://golang.org/cl/90080043

TestVariousDeadlines1Proc was flaky on my system,
failing on about 5% of runs.

LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/89830045

LGTM=robert.hencke, iant
R=golang-codereviews, robert.hencke, iant
CC=golang-codereviews
https://golang.org/cl/89760043

LGTM=dvyukov
R=rsc, iant, khr, dvyukov
CC=golang-codereviews
https://golang.org/cl/76520045

Fixes #7829

LGTM=dave
R=golang-codereviews, aram, dave
CC=golang-codereviews
https://golang.org/cl/89830043

Update #7829

LGTM=dave
R=golang-codereviews, dave
CC=golang-codereviews
https://golang.org/cl/89810043

This should have been part of 36eb4a62fbb6,
but I later discovered that addresses are all wrong.
Appropriate test added now.

LGTM=r
R=golang-codereviews, r
CC=golang-codereviews
https://golang.org/cl/89470043

Fixes #7331.

LGTM=dave, iant
R=golang-codereviews, dave, gobot, iant
CC=golang-codereviews
https://golang.org/cl/89150043

Update #7331

LGTM=dave, iant
R=golang-codereviews, dave, gobot, iant
CC=golang-codereviews
https://golang.org/cl/89520043

`GOARCH=arm go tool 6c` used to give "<prog>: cannot use 6c with GOARCH=arm"

LGTM=r
R=golang-codereviews, r
CC=golang-codereviews
https://golang.org/cl/89330043

CL 89050043 only allows -ccflags for 'go test', this
CL really handles the flag like the other -??flags.
Many thanks to Dobrosław Żybort for pointing this out.
Fixes #7810 (again).

LGTM=iant, matrixik
R=golang-codereviews, iant, matrixik
CC=golang-codereviews
https://golang.org/cl/89230044

LGTM=minux.ma
R=r, minux.ma
CC=golang-codereviews
https://golang.org/cl/89710043