Currently if the http2.Transport hits SettingsMaxConcurrentStreams for a
server, it just makes a new TCP connection and creates the stream on the
new connection. This CL updates that behavior to instead block RoundTrip
until a new stream is available.

I also fixed a second bug, which was necessary to make some tests pass:
Previously, a stream was removed from cc.streams only if either (a) we
received END_STREAM from the server, or (b) we received RST_STREAM from
the server. This CL removes a stream from cc.streams if the request was
cancelled (via ctx.Close, req.Cancel, or resp.Body.Close) before
receiving END_STREAM or RST_STREAM from the server.

Updates golang/go#13774
Updates golang/go#20985
Updates golang/go#21229

Change-Id: I660ffd724c4c513e0f1cc587b404bedb8aff80be
Reviewed-on: https://go-review.googlesource.com/53250
Run-TryBot: Tom Bergan <tombergan@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Change-Id: I35049c37558ddedb9056278c9878f3e3fd6f7f76
Reviewed-on: https://go-review.googlesource.com/53640Reviewed-by: Avelino <t@avelino.xxx>
Reviewed-by: Tom Bergan <tombergan@google.com>

We still support Go 1.6 for a few more days. (it'd normally be dropped
after Go 1.9 final is out)

And maybe we'll need to make a special case for supporting it longer
than normal if gRPC needs to.

Change-Id: I78675f1ef26aa09436a70d0f8aa3a0958768dd14
Reviewed-on: https://go-review.googlesource.com/53641Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
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RoundTrip will retry a request if it receives REFUSED_STREAM. To guard
against servers that use REFUSED_STREAM to encourage rate limiting, or
servers that return REFUSED_STREAM deterministically for some requests,
we retry after an exponential backoff and we cap the number of retries.

The exponential backoff starts on the second retry, with a backoff
sequence of 1s, 2s, 4s, etc, with 10% random jitter.

The retry cap was set to 6, somewhat arbitrarily. Rationale: this is
what Firefox does.

Updates golang/go#20985

Change-Id: I4dcac4392ac4a3220d6d839f28bf943fe6b3fea7
Reviewed-on: https://go-review.googlesource.com/50471
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Also makes it possible to capture RTM_DESYNC messages when you have a
routing protocol implementation that requires to be aware of the
health condition of kernel RIB on OpenBSD.

Change-Id: Idd0c8c5e8f5ea72a4d56c9a46c137786bcda6354
Reviewed-on: https://go-review.googlesource.com/50191
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Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: I9fb463a5b26e79073a3efc06eea13fd8fcdbf021
Reviewed-on: https://go-review.googlesource.com/50190
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Change-Id: Id891991e2b8371ad5744e7a0ec392d9d9bbeefdc
Reviewed-on: https://go-review.googlesource.com/50130Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Updates golang/go#16218

Change-Id: I613cf0a65d40a9823c83e0a547fbd48b2236d16e
Reviewed-on: https://go-review.googlesource.com/49630Reviewed-by: Mikio Hara <mikioh.mikioh@gmail.com>
Run-TryBot: Mikio Hara <mikioh.mikioh@gmail.com>

Change-Id: I38980c8463b7806c129024967713125acf663b82
Reviewed-on: https://go-review.googlesource.com/49791
Run-TryBot: Mikio Hara <mikioh.mikioh@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: Ia3dbad890e3574b34370034fd4cb4bf96323bab3
Reviewed-on: https://go-review.googlesource.com/49790
Run-TryBot: Mikio Hara <mikioh.mikioh@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Updates golang/go#17613

Change-Id: I0b272c19c263f20084a936b5122bb3cfebacc752
Reviewed-on: https://go-review.googlesource.com/49750Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Since Go 1.7 started including the context package in the core
distribution, this package has been forwarding to the core package's
implementation to the best of its ability. Since type aliases are due
to be included in the Go 1.9 release, use them to forward more
completely.

Change-Id: I97b92cd34b3f4426f565bb3d115f119d3c83a1dd
Reviewed-on: https://go-review.googlesource.com/49020
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
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Fix two format argument warnings found by vet.

Change-Id: I01d55197c110c2a7486b1bd5dbd0afd74812e535
Reviewed-on: https://go-review.googlesource.com/48090Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Fixes golang/go#13456

Change-Id: I0b938f824c47b29ac2026eff83e61c2f227a6cc1
Reviewed-on: https://go-review.googlesource.com/47530
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
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Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Change-Id: I248e5e5215960bceaba357d3d4a6e72191f955b1
Reviewed-on: https://go-review.googlesource.com/47372
Run-TryBot: Mikio Hara <mikioh.mikioh@gmail.com>
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Reviewed-by: Matt Layher <mdlayher@gmail.com>

Change-Id: I588bc65b0052efb12b3b7bc2267deedcdad029ce
Reviewed-on: https://go-review.googlesource.com/47371
Run-TryBot: Mikio Hara <mikioh.mikioh@gmail.com>
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Change-Id: I17444d1cc3ce03b6947aaae18d4cecdf9c36193f
Reviewed-on: https://go-review.googlesource.com/47110Reviewed-by: Ian Gudger <igudger@google.com>
Reviewed-by: Matt Layher <mdlayher@gmail.com>
Run-TryBot: Matt Layher <mdlayher@gmail.com>
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CL 47095 applied a change to ExampleWithTimeout to resolve test
flakiness. This change deviated ExampleWithTimeout further away
from the ExampleWithTimeout in standard library's context package.

There was a minor issue spotted in code review. Instead of attempting
to resolve it here, it's better to use the version of ExampleWithTimeout
from standard library that doesn't have the issue, and reduce
maintenance.

Change-Id: I3da9d7f7c35b33b52635df4c61058cb0b8ae95d9
Reviewed-on: https://go-review.googlesource.com/47212
Run-TryBot: Dmitri Shuralyov <shurcool@gmail.com>
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Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Got a trybot failure in
https://storage.googleapis.com/go-build-log/8aee0b8b/linux-amd64_38d0be3e.log

Change-Id: I867a658968a0088c9f3f76ff235816e4179f0bec
Reviewed-on: https://go-review.googlesource.com/47095Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>

If the transport had previously sent a RST_STREAM but had not yet
deleted the stream from its list of active streams, we should refund
connection-level flow control for any DATA frame received as such
DATA frames will never be read.

We already refund connection-level flow control if a stream closes with
unread data in bufPipe. However, when we receive a DATA frame after
reset, we don't bother writing it to bufPipe, so we have to refund the
flow control separately.

Updates golang/go#20469

Change-Id: I5a9810a5d6b1bd7e291173af53646246545a6665
Reviewed-on: https://go-review.googlesource.com/46591
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
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Change-Id: I51969f70d4fc69829fd5a8bcd8a34b3be15b9db0
Reviewed-on: https://go-review.googlesource.com/46930
Run-TryBot: Mikio Hara <mikioh.mikioh@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
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Also renames the existing example function to make it visible with
godoc command and godoc.org.

Change-Id: I0e5bef22f2a95930c59c6e79f010ba61651012cd
Reviewed-on: https://go-review.googlesource.com/46791
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Reviewed-by: Ian Gudger <igudger@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Change-Id: I288f01233defe6c673ef9dd5ec79353d3663a9af
Reviewed-on: https://go-review.googlesource.com/46790
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Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Fixes golang/go#19821

Change-Id: Iee5d43dfeaaf580c39ca38a7a3a74cf2a8b347b3
Reviewed-on: https://go-review.googlesource.com/44381
Run-TryBot: Marcel van Lohuizen <mpvl@golang.org>
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Reviewed-by: Nigel Tao <nigeltao@golang.org>

Updates golang/go#16218

Change-Id: Ice2821e873807ac4222825f0ca6f47b6a53f90b9
Reviewed-on: https://go-review.googlesource.com/46630Reviewed-by: Mikio Hara <mikioh.mikioh@gmail.com>

Parsing and building can now be done 100% allocation free for most
types. Non-name variable-length fields such as TXT records still
require allocations. Building with compression still causes allocations
due to the use of a map. Both parsing and building will perform
allocations in error paths.

Updates golang/go#16218

Change-Id: I644a7776bd0bf4ad20def521cee44eeadc5e9c06
Reviewed-on: https://go-review.googlesource.com/41145
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Change-Id: I226484f6edb0c299487b87fc0384e478969debdc
Reviewed-on: https://go-review.googlesource.com/46233
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Change-Id: If48cad79ce060625db0c04ad80f6305fd8d4b338
Reviewed-on: https://go-review.googlesource.com/46232
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Change-Id: I991e893a0f0b0aea680ef18e09008b30e8a972c6
Reviewed-on: https://go-review.googlesource.com/46231
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Change-Id: Ia73c7bfff664f91c8a4c97656d0bd9e576145aa4
Reviewed-on: https://go-review.googlesource.com/46230
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With Tom Bergan.

Updates golang/go#20704

Change-Id: Ib71202801f8c72af2f22865899c93df1f3753fdd
Reviewed-on: https://go-review.googlesource.com/46008
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
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Fixes #20478.

Change-Id: I739b6f1368889b735944d74be2d16b7e09eb11a2
Reviewed-on: https://go-review.googlesource.com/45998Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Updates golang/go#18891

Change-Id: I866862d805dc1757b27817ddb30cf22dc48ac3ff
Reviewed-on: https://go-review.googlesource.com/45993
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Update the list to revision f47d806df99585862c8426c3e064a50eb5a278f5
(2017-06-14T11:49:01Z).

The rules for the TLD zw changed thus changing the tests to bd which
has the same rule as the old zw TLD.

Change-Id: Ic4ed6eaeb3e97d20c50f44a4934576fa3f0393d7
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Updates golang/go#19103 (fixes after bundle into std)

Change-Id: I847133e289e210dedf2b89ab529478edc5de11d1
Reviewed-on: https://go-review.googlesource.com/45773
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Change-Id: I5c484662add4261f504607758521718f4c760375
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This interface can be implemented by types which are capable of
attaching compiled BPF filters to themselves, such as
x/net/ipv{4,6}.PacketConn.

Fixes golang/go#19912

Change-Id: I4674c3e312c173d5a7a3beb3cd53704f8c08e29b
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It apparently used to be called connErrorReason but when it was
renamed the comment wasn't updated. Also, the comment was split via a
blank line, detaching it from its decl node.

Change-Id: I4ae510fc0e48fd61f40489428f9da4c6cab3ef2f
Reviewed-on: https://go-review.googlesource.com/45273Reviewed-by: Hiroshi Ioka <hirochachacha@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Change-Id: I39f79ec43c73b2fcc90316713181940ada523150
Reviewed-on: https://go-review.googlesource.com/45114
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Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: I474b5832672e699f1eba1487f7f793bed3c1ff83
Reviewed-on: https://go-review.googlesource.com/45113
Run-TryBot: Mikio Hara <mikioh.mikioh@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>