The source project of this merge request has been removed.
Fix missing "Switch User" button on lockscreen with systemd 246
With newer systemd versions (since 246), getting the "CanMultiSession" property
doesn't work anymore.
It's hidden and always true, see https://github.com/systemd/systemd/commit/8f8cc84ba4612e74cd1e26898c6816e6e60fc4e9
and https://github.com/systemd/systemd/commit/c2b178d3cacad52eadc30ecc349160bc02d32a9c
So let's just assume that it's supported if the property is invalid.
BUG: 427777
FIXED-IN: 5.20.3