Log the server socket details to make it easier to run manual tests

between two machines.

components/net/sf/briar/plugins/bluetooth/BluetoothPlugin.java

@@ -64,6 +64,8 @@ class BluetoothPlugin implements StreamPlugin {
 			synchronized(this) {
 				running = true;
 				localDevice = LocalDevice.getLocalDevice();
+				if(LOG.isLoggable(Level.INFO))
+					LOG.info("Address " + localDevice.getBluetoothAddress());
 			} 
 		} catch(UnsatisfiedLinkError e) {
 			// On Linux the user may need to install libbluetooth-dev

components/net/sf/briar/plugins/socket/SocketPlugin.java

@@ -80,6 +80,10 @@ abstract class SocketPlugin implements StreamPlugin {
 			}
 			socket = ss;
 		}
+		if(LOG.isLoggable(Level.INFO)) {
+			LOG.info("Listening on " + ss.getInetAddress().getHostAddress()
+					+ ":" + ss.getLocalPort());
+		}
 		setLocalSocketAddress(ss.getLocalSocketAddress());
 		acceptContactConnections(ss);
 	}