Log Message:
stunnel: Update to 5.57

### Version 5.57, 2020.10.11, urgency: HIGH
* Security bugfixes
  - The "redirect" option was fixed to properly
    handle "verifyChain = yes" (thx to Rob Hoes).
  - OpenSSL DLLs updated to version 1.1.1h.
* New features
  - New securityLevel configuration file option.
  - FIPS support for RHEL-based distributions.
  - Support for modern PostgreSQL clients (thx to Bram Geron).
  - Windows tooltip texts updated to mention "stunnel".
  - TLS 1.3 configuration updated for better compatibility.
* Bugfixes
  - Fixed a transfer() loop bug.
  - Fixed memory leaks on configuration reloading errors.
  - DH/ECDH initialization restored for client sections.
  - Delay startup with systemd until network is online.
  - bin\libssp-0.dll removed when uninstalling.
  - A number of testing framework fixes and improvements.