fixes.

got rid of the reference to that constant, however, now when I try to do a put on the DHT I get the following exception:
```
Exception in thread "main" java.lang.UnsatisfiedLinkError: com.frostwire.jlibtorrent.swig.libtorrent_jni.session_dht_put_item__SWIG_1(JLcom/frostwire/jlibtorrent/swig/session;JLcom/frostwire/jlibtorrent/swig/char_vector;JLcom/frostwire/jlibtorrent/swig/char_vector;JLcom/frostwire/jlibtorrent/swig/entry;Ljava/lang/String;)V
	  at com.frostwire.jlibtorrent.swig.libtorrent_jni.session_dht_put_item__SWIG_1(Native Method)
	  at com.frostwire.jlibtorrent.swig.session.dht_put_item(session.java:353)
	  at com.frostwire.jlibtorrent.Session.dhtPutItem(Session.java:712)
	  at com.frostwire.jlibtorrent.demo.DhtNs.registerName(DhtNs.java:55)
	  at com.frostwire.jlibtorrent.demo.DhtNs.main(DhtNs.java:101)
Disconnected from the target VM, address: '127.0.0.1:61595', transport: 'socket'
```