Added onlineAccountsMemPoWEnabled setting (for beta testing)

src/main/java/org/qortal/settings/Settings.java

@@ -283,6 +283,11 @@ public class Settings {
 	/** Additional offset added to values returned by NTP.getTime() */
 	private Long testNtpOffset = null;
 
+	// Online accounts
+
+	/** Whether to opt-in to mempow computations for online accounts, ahead of general release */
+	private boolean onlineAccountsMemPoWEnabled = false;
+
 
 	// Data storage (QDN)
 
@@ -766,6 +771,10 @@ public class Settings {
 		return this.testNtpOffset;
 	}
 
+	public boolean isOnlineAccountsMemPoWEnabled() {
+		return this.onlineAccountsMemPoWEnabled;
+	}
+
 	public long getRepositoryBackupInterval() {
 		return this.repositoryBackupInterval;
 	}