[MacPorts] #58386: n2n: update to 2.4

[MacPorts]

#58386: n2n: update to 2.4
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 Reporter:  chrstphrchvz  |      Owner:  msmk@…
     Type:  update        |     Status:  assigned
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:
 Keywords:                |       Port:  n2n
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 The `n2n` port is still the same version as when it was submitted in 2009:
 #21827. n2n development has recently resumed, and version 2.4 was released
 last year. Source code has also moved to GitHub.

 Is there interest in keeping and updating this port?

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Ticket URL: <https://trac.macports.org/ticket/58386>
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