DocBook: Don't use graphics callouts

By default, when a callout is used, DocBook will try to use
a graphics image for callouts. This requires that the graphics
to be copied to the documentation directory. As this is not
done, use the text callouts: (1), (2), ...

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
1 file changed