fts: Improve the description of FTS_NOSTAT

Note that we still need to stat directories and the roots.

MFC after:	1 week
Sponsored by:	Klara, Inc.
Reviewed by:	kevans
Differential Revision:	https://reviews.freebsd.org/D57325

lib/libc/gen/fts.3

@@ -25,7 +25,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd May 21, 2026
+.Dd May 29, 2026
 .Dt FTS 3
 .Os
 .Sh NAME
@@ -497,6 +497,13 @@ field to
 and leave the contents of the
 .Fa statp
 field undefined.
+The roots and any directories encountered during traversal
+.Po
+.Dv FTS_D ,
+.Dv FTS_DC ,
+.Dv FTS_DP
+.Pc
+are still fully populated.
 .It Dv FTS_NOSTAT_TYPE
 This option is similar to
 .Dv FTS_NOSTAT ,