Support for port=0 which means automatically allocated port. (#40)

* Support for setting port=0 which means that its automatically allocated, typically from an ephemeral port range

java.net.ServerSocket has support for setting port==0 and will then automatically allocate a port.
trilead.LocalPortForwarder handles this fine however as a user its currently not possible to figure out which port was actually allocated in the end which this fix changes.

* added missing file

src/com/trilead/ssh2/LocalPortForwarder.java

@@ -60,4 +60,10 @@ public void close() throws IOException
 	{
 		lat.stopWorking();
 	}
+
+    public int getLocalPort() 
+    {
+        return lat.getLocalPort();
+    }
+
 }

src/com/trilead/ssh2/channel/LocalAcceptThread.java

@@ -132,4 +132,9 @@ public void stopWorking()
 		{
 		}
 	}
+
+	public int getLocalPort() 
+	{
+		return ss.getLocalPort();
+	}
 }