New cmm v1.21

– Added support for cPanel v11.38.1+ AppConfig addon registration
– Switched to using /etc/userdomains from /etc/localdomains + /etc/remotedomains to give more accurate domain/account listings

NOTE: In accordance with the new conventions for v11.38.1+ AppConfig the url to the cmm WHM plugin will change from /cgi/addon_cmm.cgi to /cgi/configserver/cmm.cgi. This will only happen with cmm v1.21+ and cPanel v11.38.1+. Older version of cmm will continue to use the old URL. This has no particular relevance to users accessing through WHM, but will affect direct URL access by users or third party applications