Multiple session start calls

[the-djmaze]

• Resolves: [Bug]: On Log out I always get: "... ignoring session_start() because a session is already active ..." #36083

OC\Session\Internal->clear() reopens the session several times as regenerateId() also reopens the sessions.
So it was like:

• $this->reopen();
• $this->regenerateId(); // $this->reopen();
• $this->startSession(true);

Secondly the sessionClosed wasn't handled properly as read_and_close might or might not be used.

[sorbaugh]

Hello @the-djmaze ! We're closing this PR as it seems that the original issue was solved with a different approach :)
Nevertheless, thank you so much for the time you put into this! Looking forward to any additional contributions!

[the-djmaze]

Good that it is solved 😉