[MacPorts] #65619: libfmt @9.x: upstream changes break dependents; create new segregated port libfmt8

[MacPorts]

#65619: libfmt @9.x: upstream changes break dependents; create new segregated port
libfmt8
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  Reporter:  mascguy                             |      Owner:  mascguy
      Type:  defect                              |     Status:  assigned
  Priority:  Normal                              |  Milestone:
 Component:  ports                               |    Version:  2.7.2
Resolution:                                      |   Keywords:  pending
      Port:  libfmt cantera poac mkvtoolnix mpd  |
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Comment (by mascguy):

 Folks, there is only one straggler left, `cherrytree`. And currently
 working on it.

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Ticket URL: <https://trac.macports.org/ticket/65619#comment:21>
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