[MacPorts] #56135: protobuf-cpp in conflict with protobuf3-cpp

[MacPorts]

#56135: protobuf-cpp in conflict with protobuf3-cpp
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  Reporter:  btywoniuk                           |      Owner:  blair
      Type:  enhancement                         |     Status:  assigned
  Priority:  Normal                              |  Milestone:
 Component:  ports                               |    Version:  2.4.2
Resolution:                                      |   Keywords:
      Port:  protobuf protobuf-cpp               |
  protobuf3-cpp protobuf-java protobuf3-java     |
  py-protobuf py-protobuf3                       |
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Comment (by blair):

 The original naming was after zeroc's ice. The plan looks good to me,
 although it doesn't leave space for protobuf 4 if it ever comes out. But
 we can worry about that problem in the future.

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Ticket URL: <https://trac.macports.org/ticket/56135#comment:7>
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