In #3208 @meyskens updated our fork of golang.org/x/crypto with a new function to fetch ACME alternative certificate chain bundles.
The fork had previously been maintained by @munnerz in his personal Github organization..

This should be a temporary fork, while we wait for our changes to be accepted by upstream.

Meanwhile:

• We should move the fork to the cert-manager organization where it can be more easily be maintained by all cert-manager team members.
• Moving it to the cert-manager org, would give more assurance to our users that the fork is carefully maintained (IMO).
• We should document in cert-manager why we are using this fork and link to upstream PRs for the changes we have made.
• The fork description should clearly explain the purpose of the fork.
• The fork should be kept up to date with the upstream repo, to ensure that we pick up bug fixes from upstream.

/kind feature