* Shutdown:

- Kill the global app context
    - Recognize multi-router case
    - Fix RandomIterator, YKGenerator, DHBuilder, NTCPConnection
      hanging on to old context -
      probably other offenders not yet found
    - Fix DHBuilder thread not stopping

router/java/src/net/i2p/data/i2np/I2NPMessageImpl.java

@@ -28,8 +28,8 @@ import net.i2p.util.SimpleByteCache;
  * @author jrandom
  */
 public abstract class I2NPMessageImpl extends DataStructureImpl implements I2NPMessage {
-    private Log _log;
-    protected I2PAppContext _context;
+    private final Log _log;
+    protected final I2PAppContext _context;
     private long _expiration;
     private long _uniqueId;