[Merge] ~mitchdz/ubuntu/+source/multipath-tools:mitch/fix_update_fail into ubuntu/+source/multipath-tools:ubuntu/focal-devel

[Mitchell Dzurick]

Now using rm_conffil in maintscript. Adding that change to lunar/jammy now.
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https://code.launchpad.net/~mitchdz/ubuntu/+source/multipath-tools/+git/multipath-tools/+merge/447587
Your team Ubuntu Sponsors is requested to review the proposed merge of ~mitchdz/ubuntu/+source/multipath-tools:mitch/fix_update_fail into ubuntu/+source/multipath-tools:ubuntu/focal-devel.