From the documentation:
Use your favorite editor to edit the provided slapd.conf(5) example (usually installed as /usr/local/etc/openldap/slapd.conf) to contain a BDB database definition of the form:
database bdb suffix "dc=<MY-DOMAIN>,dc=<COM>" rootdn "cn=Manager,dc=<MY-DOMAIN>,dc=<COM>" rootpw secret directory /usr/local/var/openldap-data
But, my domain is either 127.0.1.1 or localhost,
What should I put instead of MY-DOMAIN and in COM ?