Firewall initscript: Restore Tor IPTable rules by manual firewall restart

Firewall initscript: Restore Tor IPTable rules by manual firewall restart

If the firewall will be manually restart via '/etc/init.d/firewall restart',
the IPTable rules for the Tor relay will be deleted since 'iptables_init' only
flushes and creates inbound and unbound chains for Tor but does not restore the
ruleset from Tor initscript.

For reference and tests please see -->
https://community.ipfire.org/t/tor-stop-working-without-stop-the-process-or-give-an-error-message/10697

Signed-off-by: Erik Kapfer <erik.kapfer@ipfire.org>