Hi Micha, hi Dirk,
I think it is not a good idea to complete overwrite the logrotate.conf at update because there are some user configurable settings inside. It is better to use sed for adding the include line...
http://git.ipfire.org/?p=ipfire-2.x.git;a=commit;h=23b810171806939a23c3d5df7...
Arne