Stunnel Package: PSK Not Available
The stunnel package was recently changed to use libressl instead of openssl which appears to prevent PSK from working.
Here’s an example stunnel.conf that will replicate the issue:
[testservice] accept = 4000 connect = 4001 client = yes ciphers = PSK PSKidentity = testuser PSKsecrets = /etc/stunnel/psk.txt
[!] /etc/stunnel/stunnel.conf:6: "PSKidentity = testuser": Specified option name is not valid here
PSK works when installing
stunnel from source with openssl.
(from redmine: issue id 6428, created on 2016-11-04)