Changing the root URI

[Paul J. Lucas]

So I create a Router, create some Directory instances with a given  
rootURI, and attach them to the router.

At some later time, I want to change what the rootURI is globally  
while the server is running.  In Directory, rootRef is private and  
there's no setRootRef() method.  Why not? Similarly, Application  
doesn't have a setRoot() method.  Why not?

How can I do what I want?  Right now it seems the only way would be  
to do something like call Router.getRoutes() and replace the list  
with new Directory instances.

- Paul