Comment to 'in multisite, can I change it to another domain instead of a subdomain?'
    1. Also, can the modules be non-group based?
    2. does this setting make the bx_spaces shared between the sites, or does this setting separate the bx_spaces from one site from the other?

    define('BX_MULTISITE_MODULE', 'bx_spaces'); // group based module where multisite mode need to be enabled