We're splitting the repository into multiple ones. This one will
only retain the Python stuff (and rebind, used by websocketproxy).
Only once license is needed after this, so use the standard COPYING
filename.
* Incorporates #190 without breaking compatibility towards old Python versions.
* A new plugin allows authenticating clients by the "common name" defined in their certificate.
* Added manual for certificate-based client authentication, including hints to which Python versions allow client certificate authentication.
* Adjusted test to work with new ssl.create_default_context.