[MacPorts] #52736: port selfupdate failure on macOS Sierra

[MacPorts]

#52736: port selfupdate failure on macOS Sierra
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  Reporter:  jpwhiting       |      Owner:  ryandesign
      Type:  defect          |     Status:  assigned
  Priority:  Normal          |  Milestone:
 Component:  server/hosting  |    Version:  2.3.4
Resolution:                  |   Keywords:
      Port:                  |
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Comment (by ryandesign):

 I've seen this myself on occasion. Please wait an hour and try again. I
 expect it to be resolved when we rewrite the mprsyncup process as part of
 the move to GitHub.

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Ticket URL: <https://trac.macports.org/ticket/52736#comment:4>
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