Сделал все как в статье. В итоге:

# /usr/local/etc/rc.d/slapd start
Starting slapd.

# tail /var/log/all.log
...
Dec 10 17:32:40 fs slapd[1387]: @(#) $OpenLDAP: slapd 2.3.43 (Dec 10 2010 16:57:53) $   root@fs.licey.local:/usr/ports/net/openldap23-server/work/openldap-2.3.43/servers/slapd
Dec 10 17:32:40 fs slapd[1387]: nss_ldap: failed to bind to LDAP server ldap://localhost: Can't contact LDAP server
Dec 10 17:32:40 fs slapd[1387]: nss_ldap: could not search LDAP server - Server is unavailable
Dec 10 17:32:40 fs kernel: Dec 10 17:32:40 fs slapd[1387]: nss_ldap: could not search LDAP server - Server is unavailable
Dec 10 17:32:40 fs slapd[1387]: lt_dlopenext failed: (/usr/local/libexec/openldap/smbk5pwd.so) file not found
Dec 10 17:32:40 fs slapd[1387]: slapd stopped.
Dec 10 17:32:40 fs slapd[1387]: connections_destroy: nothing to destroy.

# uname -sr
FreeBSD 7.0-RELEASE

# pkg_info | grep openldap
openldap-client-2.3.43 Open source LDAP client implementation
openldap-server-2.3.43 Open source LDAP server implementation

# cat /usr/local/etc/openldap/slapd.conf

include                /usr/local/etc/openldap/schema/core.schema
include                /usr/local/etc/openldap/schema/cosine.schema
include                /usr/local/etc/openldap/schema/inetorgperson.schema
include                /usr/local/etc/openldap/schema/misc.schema
include                /usr/local/etc/openldap/schema/nis.schema
include                /usr/local/etc/openldap/schema/openldap.schema
include                /usr/local/etc/openldap/schema/samba.schema
include                /usr/local/etc/openldap/schema/dnszone.schema
include                /usr/local/etc/openldap/schema/dhcp.schema

pidfile                 /var/run/openldap/slapd.pid
argsfile                /var/run/openldap/slapd.args

modulepath        /usr/local/libexec/openldap
moduleload        back_ldbm

access to attrs=userPassword
    by self write
    by anonymous auth
    by * none
access to *
    by self write
    by anonymous read
    by * none

#######################################################################
# BDB database definitions
#######################################################################

allow bind_v2

database        ldbm

# Load dynamic backend modules:
# http://www.opennet.me/base/net/samba_ldap_sync.txt.html
moduleload      /usr/local/libexec/openldap/smbk5pwd.so
overlay smbk5pwd

suffix          "dc=company,dc=local"
rootdn          "cn=root,dc=company,dc=local"
rootpw          secret
directory        /var/db/openldap-data
loglevel        256
index        objectClass        eq
index        cn                eq