[MacPorts] #35867: libarchive: update to 3.x

[MacPorts]

#35867: libarchive: update to 3.x
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  Reporter:  ryandesign@…  |      Owner:  toby@…
      Type:  update        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:                |   Keywords:
      Port:  libarchive    |
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Comment (by ryandesign@…):

 rev-upgrade is only there to help users when maintainers forget to
 increase revisions to make ports rebuild. Increasing revisions when
 library versions change is still the correct solution. Just think what
 would happen if we didn't: users might get a binary from our packages
 server which rev-upgrade would immediately declare broken and have to
 rebuild.

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Ticket URL: <https://trac.macports.org/ticket/35867#comment:6>
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