busybox-ifplugd: Disable the restart target as it is not working

This issue is documented in PRJ#72. The easiest is to to keep the
old software running as everything else is racy and start-stop-daemon
does not appear to implement the --retry command. Let's see how
far we get with this workaround.

recipes-apps/busybox/busybox_sysmocom.inc

@@ -1,6 +1,6 @@
 SYSMOCOM := "${@os.path.dirname(bb.data.getVar('FILE', d, True))}"
 FILESEXTRAPATHS_prepend := "${SYSMOCOM}/files:"
-PRINC = "10"
+PRINC = "11"
 
 SRC_URI += "file://busybox-ifplugd.sh \
             file://ifplugd.sh"

recipes-apps/busybox/files/busybox-ifplugd.sh

@@ -20,10 +20,7 @@ case "$1" in
 	echo "done."
 	;;
     restart)
-        echo "restarting $DESC: $NAME... "
- 	$0 stop
-	$0 start
-	echo "done."
+        echo "Not restarting $DESC: $NAME... "
 	;;
     reload)
     	echo -n "reloading $DESC: $NAME... "