* 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
* Restructure add_server_directives to take a vhost as argument. This is the first step towards fixing vhost selection in nginx.
* Save path to vhost in file while parsing in get_vhosts().
* Disable creating a new server block when no names match.
* Make parser select vhost based on information in the vhost it found previously, rather than searching again for a match.
* Make add_server_directives update the passed vhost
* Update boulder config to pass test
* Add testing code for the _do_for_subarray function
* documentation and formatting updates
