http router keepalive support
ssl sni support
https distributed sessions (via caching)
named caches
legion subsystem
websockets subsystem
channels subsystem
perl Coro::AnyEvent loop engine
SPDY 2/3 router
advanced internal routing
auto gzip and auto-chunked encoding in http router
working fallback system for corerouters
spnego authentication
sslrouter
ipv6 improvements
faster HTTP/FastCGI/SCGI native sockets
offloading (if possible) on all of the file transfers
split request logging from general logging
advanced exceptions subsystem
language-independent HTTP body management
non-blocking everywhere
Improved static file serving