Install znc from backports

src/freedombone-app-irc

         return
     fi
 
-    apt-get -yq install znc
+    apt-get -yq -t jessie-backports install znc
 
     adduser --disabled-login --gecos 'znc' znc
 
     mkdir -p /home/znc/.znc/configs
     mkdir -p /home/znc/.znc/users
 
-    echo 'Version = 1.4' > /home/znc/.znc/configs/znc.conf
+    echo 'Version = 1.6.2' > /home/znc/.znc/configs/znc.conf
     echo '<Listener l>' >> /home/znc/.znc/configs/znc.conf
     echo "    Port = $IRC_BOUNCER_PORT" >> /home/znc/.znc/configs/znc.conf
     echo '    IPv4 = true' >> /home/znc/.znc/configs/znc.conf