[MacPorts] #63703: zstd and cyrus-sasl2 shown as outdated but won't get upgraded on macOS 12

[MacPorts]

#63703: zstd and cyrus-sasl2 shown as outdated but won't get upgraded on macOS 12
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  Reporter:  i0ntempest        |      Owner:  (none)
      Type:  defect            |     Status:  new
  Priority:  Normal            |  Milestone:
 Component:  ports             |    Version:  2.7.1
Resolution:                    |   Keywords:
      Port:  zstd cyrus-sasl2  |
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Comment (by jmroot):

 I guess you're probably using a locally generated PortIndex that was
 originally generated on a different OS version than you're now running on?

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Ticket URL: <https://trac.macports.org/ticket/63703#comment:2>
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