If you use packages, your configuration will be kept. To use new feature, you can add these parameters:

# Force account unlock when password is changed
$ad_options['force_unlock'] = false;
# Force user change password at next login
$ad_options['force_pwd_change'] = false;
# Shadow options - require shadowAccount objectClass
# Update shadowLastChange
$shadow_options['update_shadowLastChange'] = false;
# Customize theme (see http://code.google.com/intl/de-DE/apis/recaptcha/docs/customization.html)
# Examples: red, white, blackglass, clean
$recaptcha_theme = "white";