Convert to lower case

src/freedombone-utils-upgrade

     sed -i 's|Wiki|wiki|g' $COMPLETION_FILE
     sed -i 's|RSS|rss|g' $COMPLETION_FILE
     sed -i 's|Webmail|webmail|g' $COMPLETION_FILE
+    sed -i 's|Zeronet|zeronet|g' $COMPLETION_FILE
 
     if [ -f /usr/local/bin/zeronetavahi ]; then
         rm /usr/local/bin/zeronetavahi