Fix new bug81726.phpt for PHP 8.0

The error message has slightly changed, so we adapt our expectations.

Fix new bug81726.phpt for PHP 8.0

The error message has slightly changed, so we adapt our expectations.

Closes GH-9621.

Fix #81726: phar wrapper: DOS when using quine gzip file

The phar wrapper needs to uncompress the file; the uncompressed file
might be compressed, so the wrapper implementation loops. Th

Fix #81726: phar wrapper: DOS when using quine gzip file

The phar wrapper needs to uncompress the file; the uncompressed file
might be compressed, so the wrapper implementation loops. This raises
potential DOS issues regarding too deep or even infinite recursion (the
latter are called compressed file quines[1]). We avoid that by
introducing a recursion limit; we choose the somewhat arbitrary limit
`3`.

This issue has been reported by real_as3617 and gPayl0ad.

[1] <https://honno.dev/gzip-quine/>

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