Log Message:
stunnel: Update to 5.71

Changelog:
### Version 5.71, 2023.09.19, urgency: MEDIUM
* Security bugfixes
  - OpenSSL DLLs updated to version 3.1.3.
* Bugfixes
  - Fixed the console output of tstunnel.exe.
* Features sponsored by SAE IT-systems
  - OCSP stapling is requested and verified in the client mode.
  - Using "verifyChain" automatically enables OCSP
    stapling in the client mode.
  - OCSP stapling is always available in the server mode.
  - An inconclusive OCSP verification breaks TLS negotiation.
    This can be disabled with "OCSPrequire = no".
  - Added the "TIMEOUTocsp" option to control the maximum
    time allowed for connecting an OCSP responder.
* Features
  - Added support for Red Hat OpenSSL 3.x patches.