[MacPorts] #56767: pass @1.7.2: make gnupg2 dependency optional

[MacPorts]

#56767: pass @1.7.2: make gnupg2 dependency optional
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  Reporter:  woutgg       |      Owner:  judaew
      Type:  enhancement  |     Status:  closed
  Priority:  Low          |  Milestone:
 Component:  ports        |    Version:  2.5.2
Resolution:  fixed        |   Keywords:
      Port:  pass         |
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Comment (by judaew):

 I created an `+external_gpg` variant for you.

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Ticket URL: <https://trac.macports.org/ticket/56767#comment:3>
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