Comment 2 for bug 507616

The problem with editing apache2.conf is that future distro changes get lost. Once you edit a config file the end user is given two options during an upgrade. They can either replace the current file with the packaged maintainer's file or keep the edited file. So either the system loses the local change or else it because distinct to a default ubuntu configuration. The greater problem is depending on which version of apache2 was installed at the point that the change was made, the configuration can look different.

If this log line was moved to a file within conf.d then I could set up a divert which over-wrote the config without disrupting the package maintainers future changes.