add SRC definition (and use it, instead of hardcoding ../../..)

share/man/man0/mkman

@@ -1,13 +1,15 @@
 #!/bin/sh
-#	$NetBSD: mkman,v 1.3 2001/06/30 01:00:47 hubertf Exp $
+#	$NetBSD: mkman,v 1.4 2002/05/23 00:03:38 hubertf Exp $
 
 #
 # Find all manpage sources - run before tocrc
 #
 
+SRC=../../..
+
 echo Preparing data ...
 
-find ../../.. -name '*.[1-9]' -print	\
+find ${SRC} -name '*.[1-9]' -print	\
 | xargs file				\
 | grep troff				\
 | sed 's/:[ 	]*.*$//'		\