Updated for go 1.16 modules

pkg/utils/clen.go

@@ -0,0 +1,11 @@
+package utils
+
+// Clen returns the length of a null terminated string like in C
+func Clen(n []byte) int {
+	for i := 0; i < len(n); i++ {
+		if n[i] == 0 {
+			return i
+		}
+	}
+	return len(n)
+}