I've now created a merge request (https://salsa.debian.org/debian/ifupdown/-/merge_requests/21) with a slightly updated version of the patch (including a changelog entry).
- Bug#1065085: ifupdown: ifup fails when using dhcpcd on network w... ktetzlaff
- Bug#1065085: ug#1065085: Acknowledgement (ifupdown: ifup fa... ktetzlaff
- Bug#1065085: update ktetzlaff
