Since the two Ant tasks are identical (at the moment), it would be best for the old one to delegate to the new one, with the old one marked deprecated. The odl one could even print a message on each usage to encourage the user to switch to the new one. This way, we don't have two copies to keep up-to-date, just one.
Ralf, I will not get to this right away. Feel free to take this and do it yourself if you feel so moved.