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.. note:: The nginx configuration has changed from 1.x.
- Dropped Python 2.7, 3.4 and 3.5 support.
- Support for devpi-server 6.0.0.
- Redirect back to original URL after login.
- With devpi-server 6.0.0 the ``devpi-gen-config`` script
creates a ``nginx-devpi-lockdown.conf``.
- Automatically allow locations required for login page.
- Show error message for invalid credentials.
- Support Pyramid 2.0.