Please find attached a new patch. It addresses points 1. (authentication)
and 3. (splitting the code into a proper module and a script).

I'd like to ask for some assistance with the tests. Should I spawn a subprocess
for the server, and then run the client from within the test class ? Or try
to do everything from within the same process ?
(I'm making my way through roundup's testing harness through trial-and-error...)

THanks
File Added: xmlrpc.tgz