Christos Zoulas agreed to rescind clause 3 and 4 in

Christos Zoulas agreed to rescind clause 3 and 4 in
NetBSD fsck.8 rev 1.35 fsutil.h rev 1.14 pathnames.h rev 1.2
netgroup_mkdb.8 rev 1.9 netgroup_mkdb.c rev 1.18 str.c rev 1.7
str.h rev 1.4 rdate.8 rev 1.11 rdate.c rev 1.19 extern.h rev 1.14
getnetgrent.c rev 1.41 netgroup.h rev 1.10
fparseln.3 rev 1.4 fparseln.c rev 1.10

our stringlist.c/stringlist.h are derived from getnetgrent.c
rfc868time.c from rdate.c
newfs/pathnames.h from fsck/pathnames.h

https://mail-index.netbsd.org/source-changes/2009/10/21/msg002182.html
Not all files are covered as some had copyright assigned to TNF in 1998.