This method is the other half of setting RepDelayClientSync.

If an application has configured delayed master synchronization, the application must synchronize explicitly (otherwise the client remains out-of-date and ignores database changes forwarded from the replication group master). RepSync may be called any time after the client application learns that the new master has been established (by receiving REP_NEWMASTER).

Before calling this method, the RepTransport delegate must already have been configured to send replication messages.