So, I compared the new courier.sysvinit script to my existing one, and installed the new one with a little massaging for my own setup - but the newer version of the init script doesn't attempt to start "authdaemond" at all.

Clearly "courieresmtpd" seems to be trying to connect to an authdaemon (via a UNIX-domain socket, if my reading of the "truss" output is correct), yet there's nobody home. What am I missing? (I even did another "make install"/"make install-configure" in the courier-authlib 0.56 directory afterwards, to make sure everything got installed in the right places.)