Only rebroadcast file list requests when in relay mode.

src/main/java/org/qortal/controller/arbitrary/ArbitraryDataManager.java

@@ -1021,7 +1021,8 @@ public class ArbitraryDataManager extends Thread {
 
 		}
 		else {
-			// Ask our other peers if they have it
+			if (Settings.getInstance().isRelayModeEnabled()) {
+				// In relay mode - so ask our other peers if they have it
 				LOGGER.info("Rebroadcasted hash list request from peer {} for signature {} to our other peers", peer, Base58.encode(signature));
 				Network.getInstance().broadcast(
 						broadcastPeer -> broadcastPeer == peer ||
@@ -1029,6 +1030,7 @@ public class ArbitraryDataManager extends Thread {
 								? null : message);
 			}
 		}
+	}
 
 	public void onNetworkArbitrarySignaturesMessage(Peer peer, Message message) {
 		LOGGER.info("Received arbitrary signature list from peer {}", peer);