[tor-bugs] #14859 [Onionoo]: Adapt Onionoo's parsing code for MaxMind's GeoLite2 City files to their new format

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#14859: Adapt Onionoo's parsing code for MaxMind's GeoLite2 City files to their new
format
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     Reporter:  karsten  |      Owner:
         Type:  defect   |     Status:  new
     Priority:  normal   |  Milestone:
    Component:  Onionoo  |    Version:
   Resolution:           |   Keywords:
Actual Points:           |  Parent ID:
       Points:           |
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Comment (by iwakeh):

 Find a quick patch attached.

 Please make sure the error handling makes sense.

 I basically added the exception to the error log message,
 so it would be easy to determine what exactly caused
 the lookup failure.

 In addition, I set the CodingErrorAction explicitly,
 in order to avoid relying on the current jdk implementation.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/14859#comment:11>
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