Ok, so typically you don’t install apr-util with openldap support.
Well mod_authnz_ldap requires it. :/
So what you have to do is re-build it with openldap support and re-install. Sounds easy?
Well the funny thing about ports is even though you build a new version (with the +openldap variant) and install it it doesn’t get used for some reason. Here’s how you get it working:
port -f uninstall apr-util
port install apr-util +openldap
Sounds easy? Yes indeed. The -f is the trick because that’s what actually uninstalls the “bad” apr-util libraries and forces a reinstall with the new “good” libs.
Oh, and port selfupdate your installation if you haven’t recently - 1.4.0 is out and some ports don’t work with older versions.
You are a smart smart man.