I wonder if applying the following patch is a good idea.  It adds
-doperating-system-NetBSD-${DISTRIBVER}=${DISTRIBVER} to the command
line to get rid of the bunch of

    mdoc warning: .Nx: Unknown NetBSD version `3.99.18'

warnings.

Index: Makefile.inc
===================================================================
RCS file: /cvsroot/src/distrib/notes/Makefile.inc,v
retrieving revision 1.35
diff -u --unified -r1.35 Makefile.inc
--- Makefile.inc	2 Feb 2004 18:43:39 -0000	1.35
+++ Makefile.inc	20 Apr 2006 03:15:09 -0000
@@ -23,7 +23,8 @@
 	${COMMON}/donations ${COMMON}/legal.common legal \
 	${.CURDIR}/../Makefile.inc ${MERGED_SRCS}
 
-PRESET=	${GFLAGS} -dM=${M} -dV=${DISTRIBVER} -d.CURDIR=${.CURDIR} -r${M}=1
+PRESET=	${GFLAGS} -d.CURDIR=${.CURDIR} -r${M}=1 -dM=${M} \
+	-dV=${DISTRIBVER} -doperating-system-NetBSD-${DISTRIBVER}=${DISTRIBVER}
 
 POST_PLAIN= -P-b -P-u -P-o
 

SY, Uwe
-- 
uwe@ptc.spbu.ru                         |       Zu Grunde kommen
http://snark.ptc.spbu.ru/~uwe/          |       Ist zu Grunde gehen