* Script plugin initial commit
* Fix auth script path
* Return correct responses
* Added DNS-01 support
* Report the challenge pref correctly
* Use config root from certbot constants rather than hardcoded
* Remove prehook and rename posthook to cleanup for clarity
* Refactoring
* Docs
* Refactoring
* Refactoring continued, working now
* Use global preferred-challenges argument in favor of local
* Added http-01 as fallback challenge if not defined
* Do not continue if auth script not defined
* Skip unnecessary steps when running
* Read config values from correct places
* Tests and minor fixes
* Make Python 2.6 happy again
* Added CERTBOT_AUTH_OUTPUT and better tests
* Lint & Py3 fixes
* Make Python 2.6 happy again
* Doc changes
* Refactor hook execute and reuse in script plugin
* Refactored hook validation
* Added long_description for plugin help text
* Refactored env var writing
