with previous versions, but also to have many new features, such as:
* simple policy language (see "man unlang")
* virtual servers (raddb/sites-available/README)
* IPv6 support
* better proxy support (raddb/proxy.conf)
* More EAP types
* Debugging output should be MUCH easier to understand
* VMPS support
* More modules are marked "stable" (python, etc.)
* SQL configuration has been cleaned up (see raddb/sql/*)
* limited support for HUP
* check configuration and exit (radiusd -C)
* Server core is now event based (simpler, more powerful)
