Small Adjustments required for Ubuntu 18.04 or Debian 9

[soulsymphonies]

First of all, thank you for your great work.

For Debian 9 and Ubuntu 18.04 where I tested this script, to actually load the service ipset-persistent before iptables tries to load its configuration and then fails because it doesn't find the sets, it is required to change one line in the file /etc/init.d/ipset-persistent

# X-Start-Before: $network iptables-persistent

must be changed to
# X-Start-Before: $network netfilter-persistent

This is because the iptables-persistent service has onther name in these two distributions, it's called netfilter-persistent

I just share this, so maybe this can be of help for others who get stuck with this little issue.

Kind regards, Robert