* Nginx IPv6 support
* Test and lint fixes
* IPv6 tests to Nginx plugin
* Make ipv6_info() port aware
* Named tuple values for readability
* Lint fix
* Requested changes
* Allow authentication if there's no appropriate vhost
* Update test
* add flag to suppress raising error if no match is found
* Allow installation if there's no appropriate vhost
* remove traceback
* make new vhost ssl
* Fix existing bugs in nginxparser.py and obj.py
* Switch isinstance(x, str) to isinstance(x, six.string_types) in the Nginx plugin
* remove unused import
* remove unneeded custom copy from Addr
* Add docstring for create_new_vhost_from_default
* add test for create_new_vhost_from_default
* add configurator tests and leave finding the first server block for another PR
* don't assume order from a set
* address multiple default_server problem
* don't add vhosts twice
* update unit tests
* update docstring
* Add logger.info message for using default address in tlssni01 auth
* Move parse_server to be a method of NginxParser
* add super equal method to more correctly check addr equality in nginx should we support ipv6 in nginx in the future
* add addr:normalized_tuple method
* mark addresses listening sslishly due to another server block listening sslishly on that address
* test turning on ssl globally
* add docstring
* lint and remove extra file
* Cache the vhost we find during nginx deployment for OCSP enhancement.
* Refactor to pass domain into enhancement functions
* Add https redirect to most name-matching block listening non-sslishly.
* Redirect enhancement chooses the vhost most closely matching target_name that is listening to port 80 without using ssl.
* Add default listen 80 directive when it is implicitly defined
