Hi Ron, do you have any preference on an origin github repo to fork to track ongoing development?
Another update regarding 4.4 changes and WP_Network https://make.wordpress.org/core/2015/10/28/multisite-focused-changes-in-4-4/
"Take a look at ms-settings.php if you are using a custom sunrise.php ... This is a backward compatible change, though should be tested wherever your code interacts with $current_site, especially if anything has been done to extend its structure."
https://github.com/here/wordpress-mu-domain-mapping/blob/master/sunrise.php
https://github.com/here/wordpress-mu-domain-mapping/blob/master/sunrise.php#L29-L34