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- Add ``timeout`` option for LDAP connections. Defaults to 10 seconds.
- Use ``safe_load`` to read YAML config.
- The ``reject_as_unknown`` option is now true by default.
- Drop support for Python < 3.6, support for Python 3.x will end with their
respective EOLs.
- Fix deprecation warning with devpi-server 6.0.0.
- Fix pluggy deprecation warning.
- Require at least devpi-server 5.0.0.