Hi Bastian, Thanks for alerting me to this issue.
I'm looking through the package, and virtually every file carries the UCB copyright and 3-clause license. Some ALSO carry a NetBSD copyright and 4-clause license. You mentioned getid.c, which is one of those that carries both. mtree.c has only UCB. pack_dev.c has only NetBSD. So I'm unclear what to do about these that still have a UCB statement also; should it be kept? Just want to understand what to do here. - John