Overview of changes in lightdm 1.3.3
* Add a new remote session type. These sessions create a temporary local
account and authenticate against a remote server. The session is an
application that accesses that remote session (e.g. VNC, RDP etc)
* Support multiple simultaneous PAM prompts
* Set utmp ut_host field to the X display address
* Correctly reap unused authentication sessions
https://launchpad.net/lightdm/+download