This feature is available in SVN as of 7 March 2006
What is JAAS?
JAAS provides a pluggable framework for authenticating and authorising users (more information is available on the JAAS pages @ Sun Developer Network).
Many application servers support JAAS as a means of bringing greater flexibility to the declarative security models of the J2EE (now known as the Java EE) specifications.
Whilst intentionally not a full-blown application server, jetty6 supports JAAS to provide greater alternatives for servlet security, and to increase the portability of web applications.