Fix mesh crontab entries

src/freedombone

   chown -R tracker:tracker /opt/tracker
 
   # publish regularly
-  if ! grep -Fxq "zeronetavahi" /etc/crontab; then
-      echo "* *       * * *   root    zeronetavahi > /dev/null" >> /etc/crontab
+  if ! grep -q "zeronetavahi" /etc/crontab; then
+      echo "* *     * * *   root    zeronetavahi > /dev/null" >> /etc/crontab
   fi
 
   systemctl enable tracker.service
   toxavahi
 
   # publish regularly
-  if ! grep -Fxq "toxavahi" /etc/crontab; then
-      echo "* *       * * *   root    toxavahi > /dev/null" >> /etc/crontab
+  if ! grep -q "toxavahi" /etc/crontab; then
+      echo "* *     * * *   root    toxavahi > /dev/null" >> /etc/crontab
   fi
 
   systemctl restart avahi-daemon