[MacPorts] #43781: json-c @0.9: update to 0.12

[MacPorts]

#43781: json-c @0.9: update to 0.12
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 Reporter:  mister.jannick@…  |      Owner:  macports-tickets@…
     Type:  update            |     Status:  new
 Priority:  Normal            |  Milestone:
Component:  ports             |    Version:
 Keywords:  haspatch          |       Port:  json-c
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 I've updated json-c to 0.12. The old homepage is obsolete, as was the
 master site so I updated those too.

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Ticket URL: <https://trac.macports.org/ticket/43781>
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