Un-opinionate the defaults

[lvps]

Some variables have opinionated defaults: dirsrv_logging, dirsrv_simple_auth_enabled, dirsrv_password_storage_scheme (deletes current value if not set), dirsrv_ldapi_enabled, dirsrv_sasl_plain_enabled, dirsrv_dna_plugin.

To ignore them, dirsrv_factory exists. However that should be the default behavior, without the need to enable dirsrv_factory: do not change 389DS defaults, unless one of those variables is defined.