Findbugs all over

- volatile -> atomic
 - unused code and fields
 - closing streams
 - hashCode / equals
 - known non-null
 - Number.valueOf
 - new String
 Still avoiding SAM, BOB, SusiMail

apps/i2psnark/java/src/org/klomp/snark/Storage.java

@@ -1301,6 +1301,15 @@ public class Storage
           return name.compareTo(tf.name);
       }
 
+      @Override
+      public int hashCode() { return RAFfile.getAbsolutePath().hashCode(); }
+
+      @Override
+      public boolean equals(Object o) {
+          return (o instanceof TorrentFile) &&
+                 RAFfile.getAbsolutePath().equals(((TorrentFile)o).RAFfile.getAbsolutePath());
+      }
+
       @Override
       public String toString() { return name; }
   }