---- common part:
setuid = stunnel4
setgid = nogroup
pid = /var/run/stunnel4/stunnel.pid
output = /var/log/stunnel4/stunnel.log
debug = info

---- master:
[redis]
accept  = 6479
connect = 6379
ciphers = PSK
PSKsecrets = /etc/stunnel/psk.txt

---- slave:
[redis]
client = yes
accept  = localhost:6479
connect = HOST:6479
ciphers = PSK
PSKsecrets = /etc/stunnel/psk.txt


---- /etc/stunnel/psk.txt:
test1:XgN69t6CdTMXBSvuP8vW8kbSvuP8vW8kbS




