SSU: Add getVersion() methods (prep for SSU2)

router/java/src/net/i2p/router/transport/udp/InboundEstablishState.java

@@ -113,6 +113,11 @@ class InboundEstablishState {
         receiveSessionRequest(req);
     }
     
+    /**
+     * @since 0.9.54
+     */
+    public int getVersion() { return 1; }
+
     public synchronized InboundState getState() { return _currentState; }
 
     /** @return if previously complete */

router/java/src/net/i2p/router/transport/udp/OutboundEstablishState.java

@@ -151,6 +151,11 @@ class OutboundEstablishState {
         }
     }
     
+    /**
+     * @since 0.9.54
+     */
+    public int getVersion() { return 1; }
+    
     public synchronized OutboundState getState() { return _currentState; }
 
     /** @return if previously complete */

router/java/src/net/i2p/router/transport/udp/OutboundMessageState.java

@@ -104,6 +104,11 @@ class OutboundMessageState implements CDPQEntry {
         _fragmentAcks = _numFragments < 64 ? mask(_numFragments) - 1L : -1L;
         _fragmentSends = (numFragments > 1) ? new byte[numFragments] : null;
     }
+    
+    /**
+     * @since 0.9.54
+     */
+    public int getVersion() { return _peer.getVersion(); }
 
     /**
      *  @param fragment 0-63

router/java/src/net/i2p/router/transport/udp/PeerState.java

@@ -378,6 +378,11 @@ public class PeerState {
         _remoteHostId = new RemoteHostId(remoteIP, remotePort);
         _bwEstimator = new SimpleBandwidthEstimator(ctx, this);
     }
+    
+    /**
+     * @since 0.9.54
+     */
+    public int getVersion() { return 1; }
 
     /**
      *  Caller should sync; UDPTransport must remove and add to peersByRemoteHost map