add cron_flags which seemed to have been forgotten here.

ok aja@ dcoppa@

src/etc/rc.conf

@@ -1,6 +1,6 @@
 #!/bin/sh -
 #
-#	$OpenBSD: rc.conf,v 1.189 2014/04/24 15:05:10 tedu Exp $
+#	$OpenBSD: rc.conf,v 1.190 2014/06/09 18:31:58 jasper Exp $
 
 # DO NOT EDIT THIS FILE!!
 #
@@ -66,6 +66,7 @@ tftpd_flags=NO		# for normal use: "[chroot dir]"
 tftpproxy_flags=NO	# for normal use: ""
 ldomd_flags=NO		# for normal use: ""
 identd_flags=NO		# for normal use: "-e"
+cron_flags=""		# for normal use: ""
 
 # use -u to disable chroot, see nginx(8)
 nginx_flags=NO		# for normal use: ""