[MacPorts] #29513: rtorrent-devel: update to 0.8.8

[MacPorts]

#29513: rtorrent-devel: update to 0.8.8
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 Reporter:  gardnermj@…          |       Owner:  macports-tickets@…                   
     Type:  update               |      Status:  new                                  
 Priority:  Normal               |   Milestone:                                       
Component:  ports                |     Version:                                       
 Keywords:  haspatch maintainer  |        Port:  rtorrent-devel                       
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 New unstable version of rTorrent.

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Ticket URL: <https://trac.macports.org/ticket/29513>
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