root@slackware:/usr/src/wlasne/proftpd-1.2.10rc1/contrib# proftpd   
 - getaddrinfo 'slackware' error: Name or service not known
 - warning: unable to determine IP address of 'slackware'
 - error: no valid servers configured
 - Fatal: error processing configuration file '/usr/local/etc/proftpd.conf'