connection drop + no reconnect after logoff

[Rudi De Vos]

VNC was original made for single session OS ( <=XP)
Now (VIsta>=), the OS has different sessions, a logon session, user session , a service session etc...

It's not possible to keep vnc active while the session switch happen as this also cause the winvnc (desktop part)
to be restarted in the active session.

Normal, the viewer caption bar should show the status that the viewer is reconnecting and
the viewer auto reconnect when the switch is done.
(viewer options reconnect number and timeout need to be set for it)