Update go-acme/lego to 3.2.0

[kolaente]

What does this PR do?

Updates go-acme/lego to 3.2.0: https://github.com/go-acme/lego/releases/tag/v3.2.0

Motivation

Fixes bug with:

• Aurora DNS
• Cloudflare
• Digital Ocean
• OVH

Fixes #5317

Additional:

• add autodns support.

More

• Added/updated tests
• Added/updated documentation

Additional Notes

I only ran go get -u github.com/go-acme/lego/v3, verified tests are still passing and updated the docs, do I need to do anything else?

[ldez]

@kolaente could you:

• rebase the PR on the branch v2.0

git rebase --onto upstream/v2.0 f30a52c2
git push -f

• run

go mod tidy

[kolaente]

@ldez Rebased, but go mod tidy fails with

github.com/containous/traefik/v2/cmd/traefik imports
	github.com/containous/traefik/v2/autogen/genstatic: module github.com/containous/traefik@latest (v1.7.19) found, but does not contain package github.com/containous/traefik/v2/autogen/genstatic

[kolaente]

Also, I guess I should target Branch v2.0?

[ldez]

@kolaente could you:

rm -rf autogen
go generate
go mod tidy

[ldez]

Because of the undocumented and breaking changes made by GitHub, the PR content from a fork by a GitHub organization can no longer be changed by us or by our bot and it's a pain.
Sorry.

[kolaente]

Because of the undocumented and breaking changes made by GitHub, the PR content from a fork by a GitHub organization can no longer be changed by us or by our bot and it's a pain.
Sorry.

Sure no problem. I've run your commands, it worked without issues.

[ldez]

Thanks 👍