Bind zones are ok to be edited directly: increment the serial number, verify changes with service named check, then if all is ok, service named restart - tried to use rndc reload example.com, but it gave some error.
To get www2 to stick for an apache server config w/o any other mods, and for testing, I added as a server alias to the httpd.conf file, then ran /usr/local/cpanel/bin/apache_conf_distiller --update, then /usr/local/cpanel/bin/build_apache_conf