Comment # 5 on bug 887039 from Tom���� Chv��tal

I don't plan to preserve timestamp of configuration files.
It is hell road to support this configuration.

The rest of the migration was changed to always preserve the HOSTNAME content
during migration and to ensure it will always pass the install phase.

Rest is more of CANTFIX as we really can't do the rest of the magic reliably
without trampling our legs for some corner cases.