Amit írtam nem csak NetBSD-nél kérdéses, mindegyik BSD forrása tele van még mindig 4-clause licencekkel, ezért nem érzem ennyire triviálisnak a helyzetet...
$ cd /sources/netbsd/current/src/
$ grep -r "must display the following acknowledgement" * | wc -l
6263
$ cd /sources/freebsd/RELENG_7/src/
$ grep -r "must display the following acknowledgement" * | wc -l
3512
$ cd /sources/openbsd/OPENBSD_4_3/src/
$ grep -r "must display the following acknowledgement" * | wc -l
3977
$ cd /sources/dragonflybsd/current/src/
$ grep -r "must display the following acknowledgement" * | wc -l
5125
$ cd /sources/opensolaris/onnv-gate/
$ grep -r "must display the following acknowledgement" * | wc -l
817
$ echo WHOOPS?!
WHOOPS?!
$ cd /sources/xnu/xnu-1228.3.13/
$ grep -r "must display the following acknowledgement" * | wc -l
506
$ echo MMMMM
MMMMM
$ cd /sources/linux/linux-2.6.25.8/
$ grep -r "must display the following acknowledgement" * | wc -l
2
$ echo NICE
NICE
$ cd /sources/windows/WRK-v1.2/
$ grep -r "must display the following acknowledgement" * | wc -l
0
$ echo ONE OS
to Rule Them All :P