try to restart NFS LOCKD if it failed to start

(This used to be ctdb commit 2913cc93a9a172caf9e0d6675cfa4de4cc957b13)

ctdb/config/events.d/60.nfs

@@ -79,7 +79,12 @@ case "$1" in
 	} || exit $?
 
 	# check that lockd responds to rpc requests
-	ctdb_check_rpc "lockd" 100021 1
+	(ctdb_check_rpc "lockd" 100021 1)
+	[ $? = "0" ] || {
+		echo "Trying to restart lock manager service"
+		startstop_nfslock restart
+		exit 1
+	}
 
 	# mount needs special handling since it is sometimes not started
 	# correctly on RHEL5

ctdb/config/functions

@@ -417,6 +417,10 @@ startstop_nfslock() {
 		stop)
 			service nfsserver stop > /dev/null 2>&1
 			;;
+		restart)
+			service nfsserver stop
+			service nfsserver start
+			;;
 		esac
 		;;
 	rhel)
@@ -427,6 +431,10 @@ startstop_nfslock() {
 		stop)
 			service nfslock stop > /dev/null 2>&1
 			;;
+		restart)
+			service nfslock stop
+			service nfslock start
+			;;
 		esac
 		;;
 	*)