Lookup:
 domains = ${lookup ldap {user="cn=admin,dc=example,dc=com" pass=secret ldap://localhost/dc=example,dc=com?registeredAddress?sub?(registeredAddress=${quote_ldap:$domain})}}
	Output:
Start search
ldap_result loop
LDAP entry loop
LDAP attr loop registeredAddress:example.com
LDAP attr loop registeredAddress:mydomain.com
search ended by ldap_result yielding 101
ldap_parse_result: 0
ldap_parse_result yielded 0: Success
LDAP search: returning: example.com, mydomain.com
lookup yielded: example.com, mydomain.com
example.com in "example.com, mydomain.com"? no (end of list)