[MacPorts] #37271: transmission: update to 2.73

[MacPorts]

#37271: transmission: update to 2.73
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  Reporter:  macports@…    |      Owner:  mnick@…
      Type:  update        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.1.2
Resolution:                |   Keywords:  haspatch
      Port:  transmission  |
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Comment (by macports@…):

 Transmission 2.76 is out, so I updated the patch. Unfortunately, I'm not
 able to update the bug title and description.

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Ticket URL: <https://trac.macports.org/ticket/37271#comment:2>
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