[MacPorts] #27621: Upgrade transmission from 1.75 to 2.12

[MacPorts]

#27621: Upgrade transmission from 1.75 to 2.12
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 Reporter:  carsomyr@…          |       Owner:  mnick@…           
     Type:  update              |      Status:  new               
 Priority:  Normal              |   Milestone:                    
Component:  ports               |     Version:                    
 Keywords:  haspatch            |        Port:  transmission      
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Comment(by carsomyr@…):

 I've amended the Port patches by replacing xz decompression with the more
 standard bzip2 and bumping the version number to 2.13.

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Ticket URL: <https://trac.macports.org/ticket/27621#comment:3>
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