fix: stop knfsd by setting threads to 0

etc/rc.d/rc.nfsd

@@ -105,9 +105,7 @@ nfsd_stop(){
     REPLY="Already stopped"
   else
     killall --ns $$ rpc.mountd 2>/dev/null
-    killall --ns $$ nfsd 2>/dev/null
-    sleep 1
-    killall --ns $$ -9 nfsd 2>/dev/null
+    run $NFSD 0
     killall --ns $$ rpc.rquotad 2>/dev/null
     run $EXPORTFS -au
     if ! nfsd_running; then REPLY="Stopped"; else REPLY="Failed"; fi