Commit
d6398361236e915c5ccdf04290b80724cc8a4191
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: I2b01a7625cf66fbb7d203f939ddcc1cbab43cf33