URI.Host
TYPE: string/null
VERSION: 1.2.0
DEFAULT: NULL
--DESCRIPTION--

<p>
    Defines the domain name of the server, so we can determine whether or 
    an absolute URI is from your website or not.  Not strictly necessary, 
    as users should be using relative URIs to reference resources on your 
    website.  It will, however, let you use absolute URIs to link to 
    subdomains of the domain you post here: i.e. example.com will allow 
    sub.example.com.  However, higher up domains will still be excluded: 
    if you set %URI.Host to sub.example.com, example.com will be blocked. 
    <strong>Note:</strong> This directive overrides %URI.Base because
    a given page may be on a sub-domain, but you wish HTML Purifier to be
    more relaxed and allow some of the parent domains too.
</p>