Threaded server in python!?

[Matthew]

Andrew Bennetts <andrew-pythonlist at puzzling.org> wrote
 
> Using a library like Twisted <http://twistedmatrix.com/>, it's
> straightforward to handle multiple sockets, without needing threads.
> 
> As a bonus, Twisted has implementations of many common protocols, ready for
> you to use and adapt to your problem -- I strongly recommend it, as I
> suspect you will find it *much* easier than the alternatives.

Twisted looks great, based on a quick glance at the web site, but if
the license terms were on the web site I could not find them. What
license is Twisted released under?
Thanks