OpenSSL streams liveness check should be always non blocking

Description

Currently all OpenSSL streams use TCP connection. There is no point for liveness check to ever use timeout and it makes the check with and without timeout inconsistent because if it's used without timeout (which is always the case for internal PHP function like php_stream_eof), then it succeed even if no data is read - it fails only if there is an error - this is especially important for non blocking mode. However if it's used with timeout and the timeout expires, it return false. There does not seem much advantage to do that and considering that it is unused and it makes the code significantly more complex, we should remove this handling and always return immediately.

Suchen Sie die Implementierung der OpenSSL-Stream-Liveness-Prüfung und untersuchen Sie, wie Timeout- und Non-Blocking-Pfade behandelt werden. Die Arbeit ist abgeschlossen, wenn die Prüfung sofort ohne Timeout-Behandlung zurückkehrt und dabei das dokumentierte Verhalten für Fehler und Non-Blocking-Streams beibehält; identifizieren oder führen Sie die relevanten Stream-Tests aus, falls das Repository solche bereitstellt.