Remove znc user

src/freedombone-app-irc

     remove_completion_param configure_firewall_for_irc
     sed -i '/IRC /d' ${COMPLETION_FILE}
     sed -i '/znc 2> /d' /etc/crontab
+    if [ -d /home/znc ]; then
+        userdel -r znc
+    fi
 }
 
 function configure_firewall_for_irc {