Make sure to set Peer.isDataPeer() to false as well as true, to prevent bugs due to object reuse.

Also designate a peer as a "data peer" when making an outbound connection to request data from it.

src/main/java/org/qortal/network/Network.java

@@ -338,6 +338,7 @@ public class Network {
                         // Add this signature to the list of pending requests for this peer
                         LOGGER.info("Making connection to peer {} to request files for signature {}...", peerAddressString, Base58.encode(signature));
                         Peer peer = new Peer(peerData);
+                        peer.setIsDataPeer(true);
                         peer.addPendingSignatureRequest(signature);
                         return this.connectPeer(peer);
                         // If connection (and handshake) is successful, data will automatically be requested
@@ -698,6 +699,7 @@ public class Network {
             // Pick candidate
             PeerData peerData = peers.get(peerIndex);
             Peer newPeer = new Peer(peerData);
+            newPeer.setIsDataPeer(false);
 
             // Update connection attempt info
             peerData.setLastAttempted(now);

src/main/java/org/qortal/network/task/ChannelAcceptTask.java

@@ -121,9 +121,9 @@ public class ChannelAcceptTask implements Task {
 
             newPeer = new Peer(socketChannel);
             if (isDataPeer) {
-                newPeer.setIsDataPeer(true);
                 newPeer.setMaxConnectionAge(Settings.getInstance().getMaxDataPeerConnectionTime() * 1000L);
             }
+            newPeer.setIsDataPeer(isDataPeer);
             network.addConnectedPeer(newPeer);
 
         } catch (IOException e) {