* Remove PyOpenSSL based wrapper classes
* Remove unused API calls
* Add certificate renewal via X-Renewal-Signature header
* Remove (extended) key usage handling
* Clean up OpenVPN and nginx server setup code
* Use UDP port 51900 for OpenVPN by default
* Add basic auth fallback for iOS in addition to Android
* Reduce complexity
* Switch to Python 2.x due to lack of decent LDAP support in Python 3.x
* Add LDAP backend for authentication/authorization
* Add PAM backend for authentication
* Add getent backend for authorization
* Add preliminary CSRF protection
* Update icons
* Update push server documentation, use nchan from now on
* Add P12 bundle generation
* Add thin wrapper around Python's SQL connectors
* Enable mailing subsystem
* Add Kerberos TGT renewal cronjob
* Add HTTPS server setup commands for nginx