With #2403 and #3046, certbot gained the ability to parse CSRs
encoded as PEM and without a SAN extension. Update the CLI usage
docs to reflect this change.
* fix requirements.txt surgery in response to shipping certbot-nginx (#3585)
* Make --quiet reduce the logging level (#3593)
* reduce logging level and ignore verbose flags in quiet mode
* Simplify setup_logging parameters
The extra parameters were there in the past when the letsencrypt-renewer was a
separate executable that also used this function. This is cruft that can be
removed.
* Add basic tests for setup_logging
* Release 0.9.1
* Bump version to 0.10.0
