Does anybody know why those directives are in the default ispconfig.conf vhost file for Apache2?
Has been discussed several times in the forum, but I will repeat it:
Without these lines you will not be able to use wildcard virtual hosts which are available in ispconfig as default. Basically apache should not print warnings about that as its not an issue, the message should basically be "You are now able to add wildcard virtual hosts in apache on port abc" and this deserves a notice and not warning level.
We are considering to remove these lines in the next update even if this will cause users to fail again like before when they create a wildcard vhost when they did not add these settings in their config manually as not all distributions and hosting providers add them in their default settings.