Log Message:
security/duo-unix: Update to 1.10.4.

duo_unix-1.10.4:

- Removed failmode decision from auth endpoint and moved it to only
  preauth according to standards in our other integrations
- Updated Duo Unix to speak up to TLS 1.2
- Support for LibreSSL 2.7.0 and up
- Minor memory leak fixes
- Output message when user is locked out

duo_unix-1.10.3:

- Added support for http_proxy with SELinux enabled

duo_unix-1.10.2:

- Added default failmode values in config files