Karel Koci authored Jun 02, 2020 and Karel Koci committed Jun 09, 2020

This fixes problem when ipset restore failed because IPv6 address was
attempted to be added to IPv4 ipset. This commonly resulted in to empty
set on initialization (initial synchronizatio).

This is just workaround. Some addresses can be converted from IPv6 to
IPv4 and IPv6 ipsets support should be added as well.