* acme: remove Client and BackwardsCompatibleClientV2
* remove ClientTestBase and some unused variables
* add ClientV2.get_directory
* tweak ToS callback code
* acme: update example to use ClientV2.get_directory
* simplify ToS callback further into one step
* further removal of acmev1-related code
- remove acme.client.ClientBase
- remove acme.mixins.VersionedLEACMEMixin
- remove acme.client.DER_CONTENT_TYPE
- remove various ACMEv1 special cases
- remove acme.messages.ChallengeResources.combinations
* remove .mixins.ResourceMixin, fields.resource, fields.Resource
and resource field from various .message classes.
* simplify acme.messages.Directory:
- remove Directory.register
- remove HasResourceType and GenericHasResourceType
- remove ability to look up Directory resources by anything other
than the exact field name in RFC8555 (section 9.7.5)
* remove acme.messages.OLD_ERROR_PREFIX and support the old prefix
* remove acme.mixins
* reorder imports
* add comment to Directory about resource lookups
* s/new-cert/newOrder/
* get rid of `resource` sillyness in tests
* remove acmev1 terms-of-service support from directory
* Add acme library usage example
Create, edit and deactivate account.
Setup and perform http-01 challenge.
Issue, renew and revoke certificate.
* Adapt example to ACME-v2 and exclude data persistence
The code to persist/load data would length this example and distract from what is actually important.
* Fix domain names and e-mail addresses
* Remove unnecessary license header
This usage example is under the license for the acme package.
* Remove logging information
The code will be mostly read by developers, so simplify the logging info into comments.
* Revert abstraction of simple methods
All methods that are used only once in this example were expanded into the main code in order to make the process more explicit.
* Fix missing URL suffix
* Improve aesthetics and reorganize workflow
Also make words capitalization consistent and improve comments.
No complaints from pep8.
