Re: Double log-in: Possible security threat!
I tried to rename the session cookie. Renaming it from PHPSESSID to ~ID2 breaks the effect that a login into the old logs me into the new one. Then old and new are truly separated. But only old is functional!
Renaming does not re-enable the login on the new Wiki! Still the one and only access to my new 6.7 LTS (besides going directly to the DB) is to log into my 1.9.8.3...