VLESS Encryption: Add customizable 1-RTT padding parameters; Decrease memory using; Chores

Completes https://github.com/XTLS/Xray-core/pull/5067

---------

Co-authored-by: wwqgtxx <wwqgtxx@gmail.com>

common/crypto/crypto.go

@@ -10,6 +10,9 @@ func RandBetween(from int64, to int64) int64 {
 	if from == to {
 		return from
 	}
+	if from > to {
+		from, to = to, from
+	}
 	bigInt, _ := rand.Int(rand.Reader, big.NewInt(to-from))
 	return from + bigInt.Int64()
 }