* Rename plugins.common.install_ssl_options_conf to plugins.common.install_version_controlled_file
* Install ssl_dhparams file
* Add installation test
* Add ssl_dhparam option when making a server block ssl
* add install_ssl_dhparams to Installer common plugin class
* Remove redundant code and tests
* update MANIFEST.in
* Add installer class
* Add wrapped reverter methods to common.Installer.
* Use Installer class in Apache plugin
* Use Installer class in Nginx plugin
* Don't create reverter in Apache and Nginx plugins
* Add TLS-SNI-01 support to Manual plugin
* Add environment variable CERTBOT_SNI_DOMAIN for manual-auth-hook
* Make AuthenticatorTest inherit from TempDirTestCase
* Add test_get_z_domain()
* Document CERTBOT_SNI_DOMAIN in docs/using.rst
* move install_ssl_options_conf functionality to common
* add no cover
* compute current hash instead of saving
* make current hash be computed; switch to list of all canonical hashes
* put message directly into assertion
* don't pass logger
* add docstring
* Add unit tests for certbot.plugins.common.install_ssl_options_conf
* Add OS X test
* Fix apache tests
* Use absolute path first so that certbot works with non-standard $PATH
Some tests use a fake $PATH, which prevents invoking `sw_vers`
* Also test Python 3 on Mac
* Set ulimit to fix "Too many open files"
* 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
