* Use old style middleware settings for Python 2.
* Make entrypoint python2 and 3 compatible.
* Fix python command to test for mysql server.
* Bettery docker-entrypoint to work with Python 2 & 3
* Add missing braces.
* Update mailman-web to use Python 3
* Update configuration
* Python 3.6 image.
* Use alpine 3.7
* Use new style middleware
* Use alpine 3.6
* In Python 3, urlparse was renamed to urllib.parse
