1. ignore blank lines

2. /-ro/   ->  /^-ro$/ : allows hostnames containing "*-ro*" and
ignores "-root"

src/etc/security

@@ -1,6 +1,6 @@
 #!/bin/sh -
 #
-#	$OpenBSD: security,v 1.18 1997/03/17 20:17:57 gene Exp $
+#	$OpenBSD: security,v 1.19 1997/06/02 02:02:25 flipk Exp $
 #	from: @(#)security	8.1 (Berkeley) 6/9/93
 #
 
@@ -361,11 +361,11 @@ fi
 # File systems should not be globally exported.
 if [ -s /etc/exports ] ; then
 	awk '{
-		if ($1 ~ /^#/)
+		if (($1 ~ /^#/) || ($1 ~ /^$/))
 			next;
 		readonly = 0;
 		for (i = 2; i <= NF; ++i) {
-			if ($i ~ /-ro/)
+			if ($i ~ /^-ro$/)
 				readonly = 1;
 			else if ($i !~ /^-/)
 				next;