[tor-bugs] #27163 [Metrics]: Regular expression for valid AS numbers doesn't allow for AS 0

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#27163: Regular expression for valid AS numbers doesn't allow for AS 0
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 Reporter:  nusenu   |          Owner:  irl
     Type:  defect   |         Status:  accepted
 Priority:  Medium   |      Milestone:
Component:  Metrics  |        Version:
 Severity:  Normal   |     Resolution:
 Keywords:           |  Actual Points:
Parent ID:           |         Points:
 Reviewer:           |        Sponsor:
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Comment (by irl):

 I think probably we would have to do this tomorrow. I would like to have
 the time to write some extra test cases and also think about other fields
 that could do with more test cases.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/27163#comment:4>
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