add wikimedia.community, link to wikimedia.com

    for OTRS, requested by Philippe, acked by legal

    quoting Jeff:

    "according to MarkMonitor, the domain is registered
    and will list our nameservers as of June 6th "

    RT #7548
    RT #7545

Change-Id: Ie74ad82d032098230647b31270fa8ab7ac960f53
Merge "    add wikimedia.community, link to wikimedia.com"