I actually looked at the result of building an iso image and noticed
mkisofs flaming about -P and POSIX compliance:

mkisofs 2.01a32 (i386-unknown-netbsd2.99.15)
mkisofs -J -l -hide-joliet-trans-tbl -r -T  -V NETBSD_3997  -P "The NetBSD Project"  -m "/usr/obj/auto-current/releasedir/i386/installation/cdrom" -quiet -b i386/installation/floppy/boot-big.fs -c boot.catalog -graft-points -path-list cdrom.pathlist  -o /usr/obj/auto-current/releasedir/i386/installation/cdrom/netbsd-i386.iso cdrom.dir
mkisofs: The option '-P' is reserved by POSIX.1-2001.
mkisofs: The option '-P' means 'do not follow symbolic links'.
mkisofs: Mkisofs-2.01 will introduce POSIX semantics for '-P'.
mkisofs: Use -publisher in future to get old mkisofs behavior.

-- 
        Greg Troxel <gdt@ir.bbn.com>