[MacPorts] #47951: tmux: moved from SF to Github

[MacPorts]

#47951: tmux: moved from SF to Github
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  Reporter:  chunyang@…   |      Owner:  tessarek@…
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:  haspatch
      Port:  tmux         |
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Comment (by chunyang@…):

 I added "revision            1" but now I am not sure if it's necessary.

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Ticket URL: <https://trac.macports.org/ticket/47951#comment:3>
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