Check pwdnew=pwdconfirm even if old pwd is not required

Closes: #1547
5 jobs for master in 7 minutes and 6 seconds (queued for 9 seconds)
Status Job ID Name Coverage
  Build
passed #8526
build_bionic

00:03:10

passed #8525
build_stretch

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  Sign
passed #8527
sign

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  Deploy
passed #8528
pages

00:00:27

passed pages:deploy

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