[Feature request]: Ability for a plugin to use a custom domain for a specific page of the site

[CaMer0n]

Motivation

I wished to have a specific domain name correspond with a specific page of an existing site.

Proposed Solution

Add a 'domain' key to the e_url.php scheme. ie. When 'domain' value is present, e107 will search using the regexp, but also check the domain value entered is the same as what has been requested in the URL.

        $config['test'] = array(
            'domain'        =>  'example.com',
            'regex'     => '^\/?(.*)?$',
            'redirect'      => '{e_PLUGIN}myplugin/custom.php',
        );

Alternatives

Hard-coded ModRewrite for the page in .htaccess.

Additional Context

No response