Commit
3b5e7b554ecc1431119ee4eb01a47363d5d8b416
by Oliver Smithdebian/postinst: add checks, be verbose
Do not attempt to change permissions/ownership if the package gets
upgraded from a version higher than the next release.
Do not fail if the user deleted the config file.
Be verbose when changing permissions.
Related: OS#4107
Change-Id: I853097a13e27b2ebd0b940117c8f5f4b3ea49b9a