[MacPorts] #63934: fetchmail-devel is broken on macOS 11 and 12

[MacPorts]

#63934: fetchmail-devel is broken on macOS 11 and 12
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  Reporter:  steven-michaud   |      Owner:  (none)
      Type:  defect           |     Status:  new
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:
Resolution:                   |   Keywords:
      Port:  fetchmail-devel  |
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Comment (by steven-michaud):

 No errors happen installing the `fetchmail` port on macOS 11 and macOS 12
 (with the original portfile). So presumably my patch will need to be
 altered to effect only the `fetchmail-devel` subport.

 Also, the same sandbox error happens (as reported in my initial comment)
 when I specify the `+fetchmailconf` variant for `fetchmail-devel`.

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Ticket URL: <https://trac.macports.org/ticket/63934#comment:5>
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