The current author line wants to match a github author id. But
some people, including the OpenStack project, do not use github,
and additionally do not claim individual ownership but instead
group ownership.
Since there are already a couple of hard-coded examples in the
regex, just add one more. Alternately we could come up with some
mechanism to indicate that the author is purposely not listing
a github id, but that seems a bit heavywight.
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