Bug in force_ssl_on_mapped_domain function

Hi,

There is a bug in force_ssl_on_mapped_domain function in Utils.php in the line 235.
www prefix is stripped off from the domain, which breaks schema forcing, if domain contains www.

This code is no longer needed because domain mapping supports www prefixed domains now.

So please remove following line and publish a new version of the plugin
$domain = str_replace("www.", "", $domain );