[MIR] libnftnl: dependency of iptables

[Balint Reczey]

libnftnl was already MIR-ed in LP: #1545854 , but it got demoted for some reason. Now iptables links to libnftnl11 and this keeps iptables from migration to Eoan's release pocket.

[Mathieu Trudel-Lapierre (cyphermox)]

There was a previous MIR approved, and as per the usual process we do not require a new MIR bug and review if the package was in Main before and we can point to the previous MIR bug.

This package is fine to promote back to main.

[Łukasz Zemczak (sil2100)]

Override component to main
libnftnl 1.1.3-2 in eoan: universe/misc -> main
libnftnl-dev 1.1.3-2 in eoan amd64: universe/libdevel/extra/100% -> main
libnftnl-dev 1.1.3-2 in eoan arm64: universe/libdevel/extra/100% -> main
libnftnl-dev 1.1.3-2 in eoan armhf: universe/libdevel/extra/100% -> main
libnftnl-dev 1.1.3-2 in eoan i386: universe/libdevel/extra/100% -> main
libnftnl-dev 1.1.3-2 in eoan ppc64el: universe/libdevel/extra/100% -> main
libnftnl-dev 1.1.3-2 in eoan s390x: universe/libdevel/extra/100% -> main
libnftnl11 1.1.3-2 in eoan amd64: universe/libs/optional/100% -> main
libnftnl11 1.1.3-2 in eoan arm64: universe/libs/optional/100% -> main
libnftnl11 1.1.3-2 in eoan armhf: universe/libs/optional/100% -> main
libnftnl11 1.1.3-2 in eoan i386: universe/libs/optional/100% -> main
libnftnl11 1.1.3-2 in eoan ppc64el: universe/libs/optional/100% -> main
libnftnl11 1.1.3-2 in eoan s390x: universe/libs/optional/100% -> main
Override [y|N]? y
13 publications overridden.