Correct sysctl section is 2

ok jmc millert

src/etc/examples/sysctl.conf

@@ -1,7 +1,7 @@
-#	$OpenBSD: sysctl.conf,v 1.4 2015/04/03 15:50:28 millert Exp $
+#	$OpenBSD: sysctl.conf,v 1.5 2019/09/18 08:39:06 solene Exp $
 #
 # This file contains a list of sysctl options the user wants set at
-# boot time.  See sysctl(3) and sysctl(8) for more information on
+# boot time.  See sysctl(2) and sysctl(8) for more information on
 # the many available variables.
 #
 #net.inet.ip.forwarding=1	# 1=Permit forwarding (routing) of IPv4 packets