Bug#718789: apache2: upgrade wheezy -> testing (2.4.6-2) wiped out all of my log files

[Julian Gilbey <jdg@debian.org>]

Package: apache2
Version: 2.4.6-2
Severity: serious
Justification: causes data loss

I discovered that on upgrading from wheezy to the current testing,
which has just had 2.4.6-2 migrating to it, the entire contents of
/var/log/apache2 were blitzed.  I'm guessing that what I did was to
purge apache2.2-common, not realising the effects of this.  Although
there is the protection in it about not purging if upgrading to 2.4,
it seems that somehow the timings didn't work out correctly and the
purge took place anyway.

There's no "simple" or "obvious" solution to this, I guess, except to
provide a transitional apache2.2-common package with apache2 which
doesn't purge the log files on purge, now that this task has been
taken over by a different package.  The description would presumably
say: "This package may be purged after apache2 version 2.4.6 or higher
has been installed; purging prior to this may result in the loss of
historical log files."

   Julian