Commit
6b771e34bd5c9b6581f085f855589467d753b6e0
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: I1bcbe414fd18101e4d875a16539deab7baf9cb5f