Mentioning an item for future considerations when syncing with NetBSD sources. We had a PR (57441) about not having an npflog(4) man page, so I added one. I've placed the man page in the usual place (src/share/man/man4), which seemed to be the NetBSD consensus. (I did ask if we wanted to place it elsewhere to make it easier for you to sync to, should you want it upstream.)