After reading this thread [1], I'm not sure about your plan for this module.
Is the plan to: - take mod_session_crypto out of 2.4? - keep it and base 2.4 on a new release of APU 1.4.x?- or use a new release of APR (which seems like a big change at this late point in the release)?
[1] http://marc.info/?l=apache-httpd-dev&m=129105747900487&w=2 -- Jean-Sebastien
