Public bug reported:

apt-get remove resolvconf incorrectly leaves a symlink from
/etc/resolv.conf to ../run/resolvconf/resolv.conf.  apt-get purge
resolvconf leaves that symlink with no target, so DNS is broken.

The problem is in postrm: it's examining /etc/resolv.conf to see if it's
a link to /run/resolvconf/resolv.conf, but it's a relative link to
../run/resolvconf/resolv.conf, so the comparison fails, resulting in the
failures above.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: resolvconf 1.78ubuntu2
ProcVersionSignature: Ubuntu 4.4.0-24.43-generic 4.4.10
Uname: Linux 4.4.0-24-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
Date: Thu Jun 16 23:52:41 2016
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: resolvconf
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: resolvconf (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug uec-images xenial

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https://bugs.launchpad.net/bugs/1593489

Title:
  resolvconf postrm is broken, purge breaks DNS

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