…mpty JSON body in a response to the challenge.

A new extension to the ACME protocol is proposed to support device attestation: https://datatracker.ietf.org/doc/draft-acme-device-attest/
Based on the recent IETF meetings, the proposal is likely to be accepted.
To support the new extension, the ACME client will need to send a non-empty JSON body in the response to a "device-attest-01" challenge.
Fixes golang/go#68674

Change-Id: I29b420ec837f682e3d59071a4a82af56dc319134
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/608975
Reviewed-by: Roland Shoemaker <roland@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
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Auto-Submit: Roland Shoemaker <roland@golang.org>

… interface

Fixes golang/go#68688

Change-Id: Id5f72b32c61c9383a26ec182339486a432c7cdf5
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/613856
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Nicola Murino <nicola.murino@gmail.com>
Reviewed-by: Jonathan Amsterdam <jba@google.com>
Reviewed-by: Nicola Murino <nicola.murino@gmail.com>
Reviewed-by: Roland Shoemaker <roland@golang.org>

This is an automated CL which updates the NSS root bundle.

Change-Id: I3a4388574221a77486b184e73f4b776ff0afc09f
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/646215
Auto-Submit: Gopher Robot <gobot@golang.org>
Reviewed-by: Roland Shoemaker <roland@golang.org>
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Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>

Update golang.org/x dependencies to their latest tagged versions.

Change-Id: Ib9440df43bc2fde0268cbe327c1df839e793f675
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/646220
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: David Chase <drchase@google.com>
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