reading NEWS in 4.3.2 I found
- Added session_regenerate_id() function. (Sascha)
I think this should give the possibility to transit any session into a
new session, eg once authed.
And then I see that my old fixation about providing unadverted user with
a preexisting session, has been widely accepted as evil. PHP doc
mentions a nice doc, titled "Session Fixation"
http://www.acros.si/papers/session_fixation.pdf
Gian