This removes all references I could find to:
- credential provider
- authentication backend
- authentication provider
- auth provider
- auth backend
in favor of the unified:
- auth method
* Refactor to consolidate constraints on the matching chain
* Add CN prefix/suffix constraint
* Maintain backwards compatibility (pick a random cert if multiple match)
* Vendor go-glob
* Replace cn_prefix/suffix with required_name/globbing
Move all the new tests to acceptance-capable tests instead of embedding in the CRL test
* Allow authenticating against a single cert
* Add new params to documentation
* Add CLI support for new param
* Refactor for style
* Support multiple (ORed) name patterns
* Rename required_names to allowed_names
* Update docs for parameter rename
* Use the new TypeCommaStringSlice
The new STS path allows for obtaining the same credentials that you would get
from the AWS "creds" path, except it will also provide a security token, and
will not have an annoyingly long propagation time before returning to the user.
