[MacPorts] #71847: p7zip is no longer maintained as should be replaced with 7zip

[MacPorts]

#71847: p7zip is no longer maintained as should be replaced with 7zip
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  Reporter:  lcvisser                            |      Owner:  (none)
      Type:  enhancement                         |     Status:  new
  Priority:  Normal                              |  Milestone:
 Component:  ports                               |    Version:
Resolution:                                      |   Keywords:
      Port:  gecode gnat-booch95 gnat-booch95    |
  gutils-suite keka keka littleutils lzma        |
  MoltenVK p5-io-compress-lzma stardict ufo-ai   |
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Comment (by lcvisser):

 All good points.

 My motivation for opening the ticket was that someone pointed out that
 p7zip has a number of open CVEs against it. A bit further digging shows
 that there is a [https://github.com/p7zip-project/p7zip newer fork] that
 is at v17 but now also abandoned (last update 3 years ago). I'm unsure if
 there's a good way forward here...

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Ticket URL: <https://trac.macports.org/ticket/71847#comment:2>
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