use the right sysctl, doh!

pointed out by Moritz Grimm (mgrimm-at-mrsserver-dot-net)

src/etc/rc.conf

@@ -1,6 +1,6 @@
 #!/bin/sh -
 #
-#	$OpenBSD: rc.conf,v 1.159 2011/07/23 08:23:46 fgsch Exp $
+#	$OpenBSD: rc.conf,v 1.160 2011/07/24 15:33:41 fgsch Exp $
 
 # set these to "NO" to turn them off.  otherwise, they're used as flags
 ldpd_flags=NO		# for normal use: ""
@@ -33,7 +33,7 @@ route6d_flags=NO	# for normal use: ""
 rtsold_flags=NO		# for normal use: interface
 			# be sure to set net.inet6.ip6.forwarding=0
 			# be sure to set net.inet6.ip6.accept_rtadv=1
-			# be sure to set net.inet6.ip6.rediraccept=1
+			# be sure to set net.inet6.icmp6.rediraccept=1
 lpd_flags=NO		# for normal use: "" (or "-l" for debugging)
 sensorsd_flags=NO	# for normal use: ""
 hotplugd_flags=NO	# for normal use: ""