Merge branch 'tmpdir-comment' into 'master'

deckard: document usage of TMPDIR

See merge request !156
10 jobs from master in 1 minute and 28 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #235203
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test:augeas

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docker linux amd64
test:comparative:kresd

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docker linux amd64
test:flake8

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docker linux amd64
test:latest:kresd

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docker linux amd64
test:mypy

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docker linux amd64
test:pylint

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docker linux amd64
test:rplint

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docker linux amd64
test:sanity:pdnsrecursor

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docker linux amd64
test:sanity:unbound

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docker linux amd64
test:unittests

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