Extend in-band world updates to handle moons too.

node/Topology.hpp

@@ -201,6 +201,15 @@ public:
 		return _upstreamAddresses;
 	}
 
+	/**
+	 * @return Current moons
+	 */
+	inline std::vector<World> moons() const
+	{
+		Mutex::Lock _l(_lock);
+		return _moons;
+	}
+
 	/**
 	 * @return Current planet
 	 */