...
// Password Plugin options
// -----------------------
$config['password_driver'] = 'ldap_simple';
$config['password_confirm_current'] = true;
$config['password_minimum_length'] = 6;
$config['password_require_nonalpha'] = false;
$config['password_log'] = false;
$config['password_login_exceptions'] = null;
$config['password_hosts'] = null;
$config['password_force_save'] = false;
// LDAP and LDAP_SIMPLE Driver options
// -----------------------------------
$config['password_ldap_host'] = '127.0.0.1';
$config['password_ldap_port'] = '389';
$config['password_ldap_starttls'] = false;
$config['password_ldap_version'] = '3';
$config['password_ldap_basedn'] = 'dc=example,dc=com';
$config['password_ldap_method'] = 'user';
$config['password_ldap_searchDN'] = 'uid=roundcube,ou=services,dc=example,dc=com';
$config['password_ldap_searchPW'] = 'secret';
$config['password_ldap_search_base'] = 'ou=people,dc=example,dc=com';
$config['password_ldap_search_filter'] = '(uniqueIdentifier=%name)';
$config['password_ldap_encodage'] = 'crypt';
$config['password_ldap_pwattr'] = 'userPassword';
$config['password_ldap_force_replace'] = true;
...