Random_Compat: The version included with 4.4 only supports the PHP 5.2+ namespace version of libsodium, don't attempt to use it with PHP 5.2 or old libsodium versions.

Fixes #35327.

Built from https://develop.svn.wordpress.org/branches/4.4@36257


git-svn-id: http://core.svn.wordpress.org/branches/4.4@36224 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/random_compat/random.php

@@ -56,7 +56,7 @@ if (PHP_VERSION_ID < 70000) {
          * 
          * See ERRATA.md for our reasoning behind this particular order
          */
-        if (extension_loaded('libsodium')) {
+        if (PHP_VERSION_ID >= 50300 && extension_loaded('libsodium') && function_exists('\\Sodium\\randombytes_buf')) {
             // See random_bytes_libsodium.php
             require_once $RandomCompatDIR.'/random_bytes_libsodium.php';
         }