15.15 Configuration files

If your port requires some configuration files in PREFIX/etc, do not just install them and list them in pkg-plist. That will cause pkg_delete to delete files carefully edited by the user and a new installation to wipe them out.

Instead, install sample files with a suffix (filename.sample will work well) and print out a message pointing out that the user has to copy and edit the file before the software can be made to work.