Child will not return a config parsing error to the parent so rc.d will lie and

tell you that the daemon succesfully started; prevent this by running a config
check first.
Note that we only do this for those particular daemons, not all that support a
config test mode.
ok benno@ phessler@

src/etc/rc.d/bgpd

@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# $OpenBSD: bgpd,v 1.1 2011/07/06 18:55:36 robert Exp $
+# $OpenBSD: bgpd,v 1.2 2015/12/19 13:45:12 ajacoutot Exp $
 
 daemon="/usr/sbin/bgpd"
 
@@ -8,4 +8,9 @@ daemon="/usr/sbin/bgpd"
 
 pexp="bgpd: parent.*"
 
+# child will not return a config parsing error to the parent
+rc_pre() {
+	${daemon} -n ${daemon_flags}
+}
+
 rc_cmd $1

src/etc/rc.d/httpd

@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# $OpenBSD: httpd,v 1.3 2014/07/22 17:37:16 reyk Exp $
+# $OpenBSD: httpd,v 1.4 2015/12/19 13:45:12 ajacoutot Exp $
 
 daemon="/usr/sbin/httpd"
 
@@ -8,4 +8,9 @@ daemon="/usr/sbin/httpd"
 
 pexp="httpd: parent.*"
 
+# child will not return a config parsing error to the parent
+rc_pre() {
+	${daemon} -n ${daemon_flags}
+}
+
 rc_cmd $1

src/etc/rc.d/iked

@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# $OpenBSD: iked,v 1.2 2015/12/19 10:09:04 ajacoutot Exp $
+# $OpenBSD: iked,v 1.3 2015/12/19 13:45:12 ajacoutot Exp $
 
 daemon="/sbin/iked"
 
@@ -11,7 +11,9 @@ pexp="iked: parent.*"
 rc_pre() {
 	[ X"${sasyncd_flags}" != X"NO" ] && \
 		daemon_flags="-S ${daemon_flags}"
-	return 0
+	#return 0
+	# child will not return a config parsing error to the parent
+	${daemon} -n ${daemon_flags}
 }
 
 rc_cmd $1

src/etc/rc.d/relayd

@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# $OpenBSD: relayd,v 1.1 2011/07/06 18:55:36 robert Exp $
+# $OpenBSD: relayd,v 1.2 2015/12/19 13:45:12 ajacoutot Exp $
 
 daemon="/usr/sbin/relayd"
 
@@ -8,4 +8,9 @@ daemon="/usr/sbin/relayd"
 
 pexp="relayd: parent.*"
 
+# child will not return a config parsing error to the parent
+rc_pre() {
+	${daemon} -n ${daemon_flags}
+}
+
 rc_cmd $1

src/etc/rc.d/vmd

@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# $OpenBSD: vmd,v 1.2 2015/12/16 14:21:28 jturner Exp $
+# $OpenBSD: vmd,v 1.3 2015/12/19 13:45:12 ajacoutot Exp $
 
 daemon="/usr/sbin/vmd"
 
@@ -8,4 +8,9 @@ daemon="/usr/sbin/vmd"
 
 pexp="vmd: parent.*"
 
+# child will not return a config parsing error to the parent
+rc_pre() {
+	${daemon} -n ${daemon_flags}
+}
+
 rc_cmd $1