* Move SessionResource and CertificateAuthorityResource to api/session.py
* Log browser user agent for logins
* Remove static sink from backend, nginx always serves static now
* Don't emit 'attribute-update' event if no attributes were changed
* Better CN extraction from DN during lease update
* Log user who deleted request
* Remove long polling CRL fetch API call and relevant test
* Merge auth decorators ldap_authenticate, kerberos_authenticate, pam_authenticate
* Add 'kerberos subnets' to distinguish authentication method
* Add 'admin subnets' to filter traffic to administrative API calls
* Highlight recent log events
* Links to switch between 2, 3 and 4 column layouts in the dashboard
* Restored certidude client snippets in request dialog
* Various bugfixes, improved log messages
* Migrate to Python 3
* Update token generator mechanism
* Switch to Bootstrap 4
* Switch from Iconmonstr to Font Awesome icons
* Rename default CA common name to "Certidude at ca.example.lan"
* Add self-enroll for the TLS server certificates
* TLS client auth for lease updating
* Compile assets from npm packages to /var/lib/certidude/ca.example.lan/assets
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