[MacPorts] #55455: github portgroup: ability to download files from more than one github project

[MacPorts]

#55455: github portgroup: ability to download files from more than one github
project
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  Reporter:  ryandesign   |      Owner:
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:               |
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Comment (by ryandesign):

 It would also be nice to be able to include the github portgroup and use
 it to add a github distfile to a port that doesn't use github for its
 primary distfile, e.g. opencv.

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Ticket URL: <https://trac.macports.org/ticket/55455#comment:3>
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