[Zope] session-timeout-minutes value in runtime Zope

This might be an FAQ but I wasn't able to find it when searching. How do I get access to the value of 'session-timeout-minutes' coming from etc/zope.conf in runtime Zope? My app knows when people log in. I want the app to say "You'll be securely logged in for another 25 minutes unless you log out or log in again". -- Peter Bengtsson, work www.fry-it.com home www.peterbe.com hobby www.issuetrackerproduct.com