Add iscsid_flags to rc.conf so we do not try to start iscsid all the time.

Noticed by naddy@

src/etc/rc.conf

@@ -1,4 +1,4 @@
-#	$OpenBSD: rc.conf,v 1.192 2014/07/12 10:14:03 robert Exp $
+#	$OpenBSD: rc.conf,v 1.193 2014/07/13 16:49:47 claudio Exp $
 
 # DO NOT EDIT THIS FILE!!
 #
@@ -65,6 +65,7 @@ tftpproxy_flags=NO	# for normal use: ""
 ldomd_flags=NO		# for normal use: ""
 identd_flags=NO		# for normal use: "-e"
 cron_flags=		# for normal use: ""
+iscsid_flags=NO		# for normal use: ""
 
 # use -u to disable chroot, see nginx(8)
 nginx_flags=NO		# for normal use: ""