configd: make note when we are not running

Even if we are supposed to return well-formed output it's better
to show a hard error here so we can trace the problem to this message.
It's somewhat aligned with rc's restart message but not with a
question mark at the end so that it's clear...

src/sbin/configctl

@@ -1,6 +1,7 @@
 #!/bin/sh
 
 if [ ! -e /var/run/configd.pid ]; then
+	echo "configd not running!"
 	exit 1
 fi