Hi, you're right. Since 3.0.0 extension= should be used instead of zend_extension= according to the release notes:
http://xcache.lighttpd.net/wiki/Release-3.0.0 (Google cache because the lighttpd.net seems to be down atm: https://webcache.googleusercontent.com/search?q=cache:sl_Zh9TmtP8J:xcache.lighttpd.net/wiki/Release-3.0.0) -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org