[MacPorts] #56087: ntpsec @1.1.0: broken for macOS <10.13

[MacPorts]

#56087: ntpsec @1.1.0:  broken for macOS <10.13
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  Reporter:  fhgwright  |      Owner:
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:
      Port:  ntpsec     |
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Comment (by lbschenkel):

 Thanks. Unfortunately I only have a 10.13 machine to test, so I did not
 catch this. I also find it strange that I didn't get a mail from the
 buildbot notifying the failure on 10.12.

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Ticket URL: <https://trac.macports.org/ticket/56087#comment:1>
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