[MacPorts] #43748: masscan Portfile update, use github group

[MacPorts]

#43748: masscan Portfile update, use github group
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 Reporter:  jul_bsd@…  |      Owner:  macports-tickets@…
     Type:  update     |     Status:  new
 Priority:  Normal     |  Milestone:
Component:  ports      |    Version:
 Keywords:  haspatch   |       Port:  masscan
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 As discussed by mail w ryan, use github group.

 I kept livecheck.regex and master_sites as it is not working else with
 default github settings.
 It would be nice if there was an entry on github group in
 guide.macports.org, at minimum, just pointing on the code file.

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Ticket URL: <https://trac.macports.org/ticket/43748>
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