Add ability to specify custom valid status code when storing script

Author: rastating

lib/wpxf/wordpress/stored_xss.rb

@@ -25,7 +25,7 @@ def store_script
   end
 
   # Call #store_script and validate the response.
-  # @return [Boolea] return true if the script was successfully stored.
+  # @return [Boolean] return true if the script was successfully stored.
   def store_script_and_validate
     res = store_script
 
@@ -34,12 +34,17 @@ def store_script_and_validate
       return false
     end
 
-    return true if res.code == 200
+    return true if res.code == expected_status_code_after_store
 
     emit_error "Server responded with code #{res.code}"
     false
   end
 
+  # @return [Number] The status code that is expected after storing the script.
+  def expected_status_code_after_store
+    200
+  end
+
   # Run the module.
   # @return [Boolean] true if successful.
   def run