[Merge] ~robert-ancell/software-properties:esm-focal into software-properties:ubuntu/focal

[Robert Ancell]

See https://code.launchpad.net/~robert-ancell/software-properties/+git/software-properties/+merge/400153 for the related change to master.
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https://code.launchpad.net/~robert-ancell/software-properties/+git/software-properties/+merge/400305
Your team Ubuntu Core Development Team is requested to review the proposed merge of ~robert-ancell/software-properties:esm-focal into software-properties:ubuntu/focal.