As I prefer to have instance specific configuration already on instance creation (eg. default admin and ldap settings) I ported it from 4.3 to current head and made it configurable in portal-ext.properties to avoid confusion (
Attached is ConfigurationImpl.java and PropsUtil.java (rev 21163).
.properties in portal-ext.properties to enable the feature.
I'd very much like to have this included again. Please let me know if I can do something else.