* get http01 challenge working
* support multiple challenge types in configurator.py
* update existing nginx tests
* lint
* refactor NginxHttp01 and NginxTlsSni01 to both now inherit from NginxChallengePerformer
* remove TODO
* challenges_test tests with both tlssni01 and http01
* Make challenges.py more abstract to make lint happier
* add pylint disables to the tests to make pylint happier about the inheritance and abstraction situation
* no need to cover raise NotImplementedError() lines
* python3 compatibility
* test that http01 perform is called
* only remove ssl from addresses during http01
* Initialize addrs_to_add
* Change Nginx http01 to modify server block so the site doesn't stop serving while getting a cert
* pass existing unit tests
* rename sni --> http01 in unit tests
* lint
* fix configurator test
* select an http block instead of https
* properly test for port number
* use domains that have matching addresses
* remove debugger
* remove access_log and error_log cruft that wasn't being executed
* continue to return None from choose_redirect_vhost when create_if_no_match is False
* add nginx integration test
* Add a simple version of HTTP01
* remove cert from chall name
* make directory work on 2.2
* cleanup challenges when finished
* import shutil
* fixup perform and cleanup tests
* Add tests for http_01.py
* Fix rebootstrapping before venv move
* add regression test
* dedupe test
* Cleanup case when two venvs exist.
* Add clarifying comment
* Add double venv test to leauto_upgrades
* Fix logic with the help of coffee
* redirect stderr
* pass VENV_PATH through sudo
* redirect stderr
