Added a method to clear the allowedAccess array.

src/Ratchet/Server/FlashPolicy.php

@@ -72,6 +72,18 @@ class FlashPolicy implements MessageComponentInterface {
         return $this;
     }
     
+    /**
+     * Removes all domains from the allowed access list.
+     * 
+     * @return \Ratchet\Server\FlashPolicy
+     */
+    public function clearAllowedAccess() {
+        $this->_access      = array();
+        $this->_cacheValid = false;
+
+        return $this;
+    }
+
     /**
      * site-control defines the meta-policy for the current domain. A meta-policy specifies acceptable
      * domain policy files other than the master policy file located in the target domain's root and named