Commit
c27931ad1c9c6d9383a3f15c3727905a3520286e
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: I36d4837cb9a1ae87df3ee457c6031295cf2083ca