Add "FAQ" page
    
    This is pretty much a copy & paste from the original, with basically a
    few changes:
    
    - pointing some links to pagure instead of fedorahosted;
    - commenting out the AD section as those were not migrated yet.
    
    Signed-off-by: Fabiano Fidêncio <fidencio@redhat.com>
    Co-author: Jakub Hrozek <jhrozek@redhat.com>