Allow overriding the default secret key. Proy. Props nbachiyski. fixes #5960

git-svn-id: https://develop.svn.wordpress.org/trunk@6982 602fd350-edb4-49c9-b593-d223f7449a82

wp-settings.php

@@ -275,6 +275,12 @@ if (strpos($_SERVER['PHP_SELF'], 'install.php') === false) {
 	define('COOKIEHASH', $cookiehash);
 }
 
+/**
+ * Should be exactly the same as the default value of SECRET_KEY in wp-config-sample.php
+ * @since 2.5
+ */
+$wp_default_secret_key = 'put your unique phrase here';
+
 /**
  * It is possible to define this in wp-config.php
  * @since 2.0.0