Specifies how master and client sites will handle acknowledgment of replication messages which are necessary for "permanent" records.
                 The syntax of this parameter in the DB_CONFIG file is a
                 single line with the string
                 repmgr_set_ack_policy, one or more
                 whitespace characters, and the ack_policy parameter
                 specified as a string. For example:
            
repmgr_set_ack_policy DB_REPMGR_ACKS_ALL
Specifies that the master should wait until all replication clients have acknowledged each permanent replication message.
The ack_policy parameters are:
For more information, see DbEnv::repmgr_set_ack_policy().