Package autocert provides automatic access to certificates from Let's Encrypt and any other ACME-based CA. It is heavily based on the ideas from rsc.io/letsencrypt. Change-Id: I62021452a918cd49093162f3d6c74e9d7f452fb8 Reviewed-on: https://go-review.googlesource.com/23970 Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>