Commit
afe7a51c8f046b239d9b9828938d901b7a03d15a
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: I8994759df644d6edd8f937051b95690537b749be