document semi-internal parts used by dpb(1)

diff --git a/share/man/man5/bsd.port.mk.5 b/share/man/man5/bsd.port.mk.5
index 1c0c5b7..bb70dbd 100644 (file)
--- a/share/man/man5/bsd.port.mk.5
+++ b/share/man/man5/bsd.port.mk.5
@@ -1,4 +1,4 @@
-.\" $OpenBSD: bsd.port.mk.5,v 1.636 2023/09/27 12:24:22 espie Exp $
+.\" $OpenBSD: bsd.port.mk.5,v 1.637 2023/10/18 08:03:19 espie Exp $
 .\"
 .\" Copyright (c) 2000-2008 Marc Espie
 .\"
@@ -24,7 +24,7 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: September 27 2023 $
+.Dd $Mdocdate: October 18 2023 $
 .Dt BSD.PORT.MK 5
 .Os
 .Sh NAME
@@ -3088,6 +3088,16 @@ all the work will need to be done again.
 .Pp
 See also
 .Ev BUILD_ONCE .
+.It Ev RANDOMIZE_SUBDIRS
+Actually lives in
+.Pa bsd.port.subdir.mk .
+Set to
+.Sq Yes
+to randomize tree traversal, as used by
+.Xr dbp 1 Ns 's Fl r
+option.
+Defaults to
+.Sq \&No Ns .
 .It Ev RCDIR
 Location for daemon startup scripts.
 Defaults to