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().