1.4.0

• Last major release to support Python 2.7 and 3.4.
• The Python API has changed slightly when doing connectivity testing.
  • A guide on how to update your code is available here. The migration should only require changing a few lines of code.
• When using the Python API, more specialized errors (ie. subclasses of ServerConnectivityError) are returned when connectivity testing failed, so that it is easier to know what went wrong. Your existing code should still work the same.
• Replaced the --timeout and --nb_retries CLI options with --slow_connection, for when the connection is slow or the server cannot support many concurrent connections.
• Updated TLS 1.3 support to draft 23.
• Bug fixes for client authentication.
• Bug fixes Alpine Linux.