…sponse body read

When sending a Request with a non-context deadline, we create a
context with a timeout. This context is canceled when closing the
response body, and also if a read from the response body returns
an error (including io.EOF).

Cancelling the context in Response.Body.Read interferes with the
HTTP/2 client cleaning up after a request is completed, and is
unnecessary: The user should always close the body, the impact
from not canceling the context is minor (the context timer leaks
until it fires).

Fixes #49559.
For #49366.

Change-Id: Ieaed866116916261d9079f71d8fea7a7b303b8fb
Reviewed-on: https://go-review.googlesource.com/c/go/+/361919
Trust: Damien Neil <dneil@google.com>
Run-TryBot: Damien Neil <dneil@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
(cherry picked from commit 76fbd6167364fb98e3ebe946cfc16b5b84d4240e)
Reviewed-on: https://go-review.googlesource.com/c/go/+/368085
Reviewed-by: Michael Knyszek <mknyszek@google.com>

…tity in responses

Server handlers may set a "Transfer-Encoding: identity" header on
responses to disable chunking, but this header should not be sent
on the wire.

For #49194.
Fixes #49568.

Change-Id: I46a9e3b8ff9d93edd7d1c34d264fc309fa322ad5
Reviewed-on: https://go-review.googlesource.com/c/go/+/359176
Trust: Damien Neil <dneil@google.com>
Run-TryBot: Damien Neil <dneil@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
(cherry picked from commit b69b2f63d65609b400b4a40ae01e4a48638f050f)
Reviewed-on: https://go-review.googlesource.com/c/go/+/368087
Reviewed-by: Michael Knyszek <mknyszek@google.com>

Pull in approved backports to golang.org/x/net/http2:

    85e122b net/http2: Fix handling of expect continue
    1dc0aec http2: don't count aborted streams as active in tests
    e973a42 ipv6: OpenBSD does not appear to support multicast loopback
    9592dd5 http2: avoid busy loop when ResponseHeaderTimeout is set
    94fb2bc http2: avoid spurious RoundTrip error when server closes and resets stream
    e108c19 http2: close conns after use when req.Close is set

By doing:

    $ go get -d golang.org/x/net@internal-branch.go1.17-vendor
    go: upgraded golang.org/x/net v0.0.0-20211101194204-95aca89e93de => v0.0.0-20211201233630-85e122b1a9b3
    $ go mod tidy
    $ go mod vendor
    $ go generate -run=bundle std

Fixes #49561.
Fixes #49624.
Fixes #49662.
Fixes #49905.
Fixes #49909.
Fixes #49911.

Change-Id: Ia8f432bd3ea77d24e63d46c8ed2ac8d275406b52
Reviewed-on: https://go-review.googlesource.com/c/go/+/368574
Trust: Michael Knyszek <mknyszek@google.com>
Run-TryBot: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>

This commit adds an experimental factory for create proxying
TLS connections using uTLS rather than crypto/tls.

A user has requested this functionality.

For now, I'd like to avoid advertising it until I get confirmation
that this interface is okay for the user who requested it.

When it's confirmed it's okay, I'll change the README.