• Added support for "2 week" secret lifetimes.
• The NO_SSL environment variable is now properly parsed.
• The URL_PREFIX environment variable can be used to add a prefix to URLs,
  which is useful when running behind a reverse proxy like nginx.
• Prevent prefetching bots from destroying secrets.
• Replaced mockredis with fakeredis in the unit test environment.
• Added support for Python 3.8.