propagated. Return all operational attributes as well as user
attributes for final comparison; DBs should be 100% identical
except for the auditContext attribute which only exists on the master.

attributes may be propagated. use them in delta-sync.

Avoids unnecessary rewrites of unchanged attributes.

Allow configuring a consumer on the provider that points to the provider
but is a no-op. This ensures that the consumer will continue to be a
consumer after the replication occurs.

dynamic adds.

out as well.

Probably should be tunable. Probably should add hit/miss counters
to monitor to assist in tuning...