[MacPorts] #44299: iperf: Update to version 3.0.11

[MacPorts]

#44299: iperf: Update to version 3.0.11
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  Reporter:  smith.kennedy+macports@…  |      Owner:  macports-tickets@…
      Type:  update                    |     Status:  new
  Priority:  Normal                    |  Milestone:
 Component:  ports                     |    Version:
Resolution:                            |   Keywords:
      Port:  iperf                     |
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Comment (by msavory@…):

 To maintain a version with backward compatibility with other nodes, I have
 made my own iperf2 port in my private repository. I believe this really
 should have been a new port as it implements a different testing protocol.

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Ticket URL: <https://trac.macports.org/ticket/44299#comment:15>
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