Here is a more important fix.
This allows to sort dependencies more accurately. But I think I might move apache2 dependencies out of lemonldap-ng-conf into the respective handler,manager,portal sub-packages. Because lemonldap-ng-fastcgi-server might not rely on apache/mod_perl at all (but still relies on lemonldap-ng-conf).
On a next patch, I will rework the post/postun to install the apache config symlinks only when relevant (handler,manager,portal sub-packages).