$NetBSD$

Do not try to build man page on NetBSD.

--- configure.orig	2015-01-09 11:02:14.000000000 +0000
+++ configure
@@ -96,6 +96,7 @@ if $BSD ; then
 	done
 
 	echo 'NO_MAN	=	not_yet'
+	echo 'MAN	=	'
 	echo 'LDADD	+=	-lm'
 	echo 'WARNS	?=	6'
 	echo '.include <bsd.prog.mk>'
