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* cloud-init: 22.4 -> 23.1.1 * cloud-init: add udhcpc support Cloud-init use as dhcp client, dhclient, which is coming from the unmaintained package, isc-dhcp-client (refer https://www.isc.org/dhcp/) which ended support in 2022. dhclient is deprecated in nixos Add patch to use `udhcpc` dhcp client coming from busybox instead. PR based on #226173 refs #215571 upstream PR: https://github.com/canonical/cloud-init/pull/2125