that a new userSessionId will be created and that the current sessionId (the actual
session object's id) will be set to this new id.
Add several new tests to Session/Var.t Tried hard to exploit the change in
sessionId and haven't found a way, yet.
be fixed later.
Added lots of comments to start and new subs. Changed db methods to
use placeholders. Changed timely data to call time once so that they
all match.