Feature summary : Request for new interwiki links for vrt-wiki

Benefits : Following OTRS's renaming to VRT, the new site for it is vrt-wiki.wikimedia.org . Having interwiki links that closely resemble the new name, i.e., vrt & vrt-wiki may help those who are seeking vrt support & are accustomed to using the first part of sitename as interwiki links, because currently first part of sitename work as interwiki links for almost all other wikis.