Merge branch 'issue/466' into 'develop'

SCRUM#466: Allow guests to shutdown only when no one else is logged in

See merge request !33
4 jobs for develop in 7 minutes and 37 seconds (queued for 6 seconds)
Status Job ID Name Coverage
  Lint
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debian-packaging
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  Build
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debian-packaging
build

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  Test
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ubuntu debootstrap
test

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  Deploy
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debian-packaging
deploy_for_unstable

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