fix write files and deprecated calls

params.go

@@ -1,12 +1,12 @@
 package main
 
 import (
-	"io/ioutil"
+	"os"
 	"strings"
 )
 
 func param(name, defaultValue string) (value string) {
-	ba, err := ioutil.ReadFile("/proc/cmdline")
+	ba, err := os.ReadFile("/proc/cmdline")
 	if err != nil {
 		fatal("could not read /proc/cmdline: ", err)
 	}