The session cookie was recently renamed from `PHPSESSID` to
`__Host-Http-PHPSESSID` (commit 3871179a). When watchtower updates the
mastercontainer, the browser still holds the old `PHPSESSID` cookie, but the
new code only looks for `__Host-Http-PHPSESSID`. The old cookie is ignored, a
fresh unauthenticated session is created, and the user is logged out.
Fix: before starting the new session in index.php, check if the old `PHPSESSID`
cookie exists and carries an authenticated session. If it does, destroy the old
session and mark the new one as authenticated via `SetAuthState(true)`.
Agent-Logs-Url: https://github.com/nextcloud/all-in-one/sessions/cba0ea31-e257-4ec1-82ae-dd66f0f34d98
---
refactor: address review comments - use constant for session key and activity interval
Agent-Logs-Url: https://github.com/nextcloud/all-in-one/sessions/cba0ea31-e257-4ec1-82ae-dd66f0f34d98
Co-Authored-By: szaimen <42591237+szaimen@users.noreply.github.com>
