take logfile from env if set, default to /var/log/syslog
take logfile from env if set, default to /var/log/syslog

Yubico/yubikey-val,ahojjati/yubikey-val,Yubico/yubikey-val,Yubico/yubikey-val,ahojjati/yubikey-val,ahojjati/yubikey-val