The functionality in ldapconf has been divided beetween three different tasks:
LDAP client
The client mode is available for ordinary users. You can configure the default settings, and there are also some small client applications available.
You need the openldap package to use the ldapconf client mode.
LDAP server
This is for running a LDAP directory server. You can configure the global server settings. You can configure one database directory.
You need the openldap-server package to use the ldapconf server mode.
LDAP system
This is when the system uses LDAP to retrive NIS type information or PAM authentication from an LDAP server.
Currently this not recomended on production machines.
You need the ldapns package and maybe openldap-devel to use the ldapconf system mode.