*[Sessions]: Now session is accessible if process is ran by root. #1360
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Fixing bug: https://bugs.php.net/bug.php?id=69582
Use case: session is initiated by Apache with non-root permissions. Later on, session could be accessed by backend process, which runs under root, but needs to communicate with same session data as Apache process.
Didn't work before this commit: session file is owned by non-root, process owner != file owner, so this triggered file handle closure.