RINO 2 based on php-encryption

reenable RINO 1 functions, add a deprecation note.
use by default RINO 2 , with crypto from php-encryption
fallback to RINO 1 for old nodes.

library/defuse/php-encryption-1.2.1/example.php

@@ -0,0 +1,36 @@
+<?php
+require_once('Crypto.php');
+  try {
+      $key = Crypto::CreateNewRandomKey();
+      // WARNING: Do NOT encode $key with bin2hex() or base64_encode(),
+      // they may leak the key to the attacker through side channels.
+  } catch (CryptoTestFailedException $ex) {
+      die('Cannot safely create a key');
+  } catch (CannotPerformOperationException $ex) {
+      die('Cannot safely create a key');
+  }
+
+  $message = "ATTACK AT DAWN";
+  try {
+      $ciphertext = Crypto::Encrypt($message, $key);
+  } catch (CryptoTestFailedException $ex) {
+      die('Cannot safely perform encryption');
+  } catch (CannotPerformOperationException $ex) {
+      die('Cannot safely perform decryption');
+  }
+
+  try {
+      $decrypted = Crypto::Decrypt($ciphertext, $key);
+  } catch (InvalidCiphertextException $ex) { // VERY IMPORTANT
+      // Either:
+      //   1. The ciphertext was modified by the attacker,
+      //   2. The key is wrong, or
+      //   3. $ciphertext is not a valid ciphertext or was corrupted.
+      // Assume the worst.
+      die('DANGER! DANGER! The ciphertext has been tampered with!');
+  } catch (CryptoTestFailedException $ex) {
+      die('Cannot safely perform encryption');
+  } catch (CannotPerformOperationException $ex) {
+      die('Cannot safely perform decryption');
+  }
+?>