New global plugin: update_siteurl.php to fix themes POSTing to http when over https

wp-content/mu-plugins/update_siteurl.php

+<?php
+/*
+Plugin Name: Update the 'siteurl' and 'home' options
+Plugin URI: https://noblogs.org
+Description: Update the 'siteurl' and 'home' options to site_url(), this is necessary to fix a lot of themes which don't take into account https. See also http://wordpress.org/support/topic/blank-wp-comments-postphp-page-when-commenting-on-numerous-wordpress-blogs
+Version: 0.1
+Author: Autistici/Inventati
+Author URI: https://noblogs.org/
+*/
+
+function update_siteurl() {
+
+    update_option('siteurl',site_url());
+    update_option('home',site_url());
+
+}
+
+update_siteurl();
+
+?>