netlink: add support for adding/deleting interface addresses

[melifaro]

Test Plan

kyua test -k /usr/tests/sys/netlink/Kyuafile 'test_rtnl_ifaddr.py'
test_rtnl_ifaddr.py:TestRtNlAddIfaddrLo::test_add_4[host]  ->  passed  [0.278s]
test_rtnl_ifaddr.py:TestRtNlAddIfaddrLo::test_add_4[prefix]  ->  passed  [0.385s]
test_rtnl_ifaddr.py:TestRtNlAddIfaddrLo::test_add_6[gu_host]  ->  passed  [0.298s]
test_rtnl_ifaddr.py:TestRtNlAddIfaddrLo::test_add_6[gu_prefix]  ->  passed  [0.380s]
test_rtnl_ifaddr.py:TestRtNlAddIfaddrLo::test_del[ifa_address-ipv4_host]  ->  passed  [0.441s]
test_rtnl_ifaddr.py:TestRtNlAddIfaddrLo::test_del[ifa_address-ipv4_prefix]  ->  passed  [0.308s]
test_rtnl_ifaddr.py:TestRtNlAddIfaddrLo::test_del[ifa_address-ipv6_gu_host]  ->  passed  [0.309s]
test_rtnl_ifaddr.py:TestRtNlAddIfaddrLo::test_del[ifa_address-ipv6_gu_prefix]  ->  passed  [0.337s]
test_rtnl_ifaddr.py:TestRtNlAddIfaddrLo::test_del[ifa_local-ipv4_host]  ->  passed  [0.409s]
test_rtnl_ifaddr.py:TestRtNlAddIfaddrLo::test_del[ifa_local-ipv4_prefix]  ->  passed  [0.303s]
test_rtnl_ifaddr.py:TestRtNlAddIfaddrLo::test_del[ifa_local-ipv6_gu_host]  ->  passed  [0.337s]
test_rtnl_ifaddr.py:TestRtNlAddIfaddrLo::test_del[ifa_local-ipv6_gu_prefix]  ->  passed  [0.359s]
test_rtnl_ifaddr.py:TestRtNlIfaddrList::test_46_filter_family_compat  ->  passed  [0.356s]
test_rtnl_ifaddr.py:TestRtNlIfaddrList::test_46_filter_iface  ->  passed  [0.369s]
test_rtnl_ifaddr.py:TestRtNlIfaddrList::test_46_nofilter  ->  passed  [0.326s]
test_rtnl_ifaddr.py:TestRtNlIfaddrList::test_4_broadcast  ->  passed  [0.326s]
test_rtnl_ifaddr.py:TestRtNlIfaddrList::test_6_broadcast  ->  passed  [0.352s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsBroadcast::test_add_4  ->  passed  [0.314s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsBroadcast::test_add_4_carp  ->  passed  [0.339s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsBroadcast::test_add_4_empty_addr  ->  passed  [0.295s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsBroadcast::test_add_4_empty_ifindex  ->  passed  [0.298s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsBroadcast::test_add_4_empty_message  ->  passed  [0.313s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsBroadcast::test_add_6  ->  passed  [0.337s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsBroadcast::test_add_6_carp  ->  passed  [0.301s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsBroadcast::test_add_6_flags[autoconf,deprecated]  ->  passed  [0.309s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsBroadcast::test_add_6_flags[autoconf]  ->  passed  [0.333s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsBroadcast::test_add_6_flags[deprecated]  ->  passed  [0.319s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsBroadcast::test_add_6_flags[prefer_source]  ->  passed  [0.309s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsBroadcast::test_add_6_lifetime  ->  passed  [0.291s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsBroadcast::test_del[ifa_address-ipv4_host]  ->  passed  [0.327s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsBroadcast::test_del[ifa_address-ipv4_prefix]  ->  passed  [0.335s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsBroadcast::test_del[ifa_address-ipv6_gu_host]  ->  passed  [0.331s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsBroadcast::test_del[ifa_address-ipv6_gu_prefix]  ->  passed  [0.320s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsBroadcast::test_del[ifa_local-ipv4_host]  ->  passed  [0.339s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsBroadcast::test_del[ifa_local-ipv4_prefix]  ->  passed  [0.360s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsBroadcast::test_del[ifa_local-ipv6_gu_host]  ->  passed  [0.350s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsBroadcast::test_del[ifa_local-ipv6_gu_prefix]  ->  passed  [0.332s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsP2p::test_add_4[dst_inside_24]  ->  passed  [0.334s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsP2p::test_add_4[dst_inside_30]  ->  passed  [0.352s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsP2p::test_add_4[dst_inside_31]  ->  passed  [0.321s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsP2p::test_add_4[dst_outside_30]  ->  passed  [0.343s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsP2p::test_add_4[dst_outside_32]  ->  passed  [0.428s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsP2p::test_add_6[dst_inside_127]  ->  skipped: /usr/tests/sys/netlink/test_rtnl_ifaddr.py:557: AssertionError  [0.373s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsP2p::test_add_6[dst_inside_64]  ->  skipped: /usr/tests/sys/netlink/test_rtnl_ifaddr.py:557: AssertionError  [0.342s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsP2p::test_add_6[dst_outside_128]  ->  passed  [0.316s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsP2p::test_add_6[dst_outside_64]  ->  skipped: /usr/tests/sys/netlink/test_rtnl_ifaddr.py:557: AssertionError  [0.458s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsP2p::test_del[ifa_addr=addr,ifa_local=addr-ip6_dst_outside_128]  ->  passed  [0.366s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsP2p::test_del[ifa_addr=addr,ifa_local=addr-ipv4_dst_inside_30]  ->  passed  [0.366s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsP2p::test_del[ifa_addr=addr,ifa_local=addr-ipv4_dst_outside_32]  ->  passed  [0.291s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsP2p::test_del[ifa_addr=addr-ip6_dst_outside_128]  ->  passed  [0.363s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsP2p::test_del[ifa_addr=addr-ipv4_dst_inside_30]  ->  passed  [0.350s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsP2p::test_del[ifa_addr=addr-ipv4_dst_outside_32]  ->  passed  [0.367s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsP2p::test_del[ifa_local=addr-ip6_dst_outside_128]  ->  passed  [0.323s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsP2p::test_del[ifa_local=addr-ipv4_dst_inside_30]  ->  passed  [0.392s]
test_rtnl_ifaddr.py:TestRtNlIfaddrOpsP2p::test_del[ifa_local=addr-ipv4_dst_outside_32]  ->  passed  [0.338s]

Results file id is usr_tests_sys_netlink.20230515-120253-906199
Results saved to /home/melifaro/.kyua/store/results.usr_tests_sys_netlink.20230515-120253-906199.db

55/55 passed (0 failed)