[MacPorts] #45781: gtkextra3: new port

[MacPorts]

#45781: gtkextra3: new port
-------------------------------+--------------------------------
  Reporter:  Tom.Schoonjans@…  |      Owner:  macports-tickets@…
      Type:  submission        |     Status:  new
  Priority:  Normal            |  Milestone:
 Component:  ports             |    Version:  2.3.2
Resolution:                    |   Keywords:
      Port:  gtkextra3         |
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Comment (by ionic@…):

 I've changed the name back to `gtkextra3` and the categories to `x11
 devel`:

 https://git.ionic.de/macports-
 overlay.git/blob_plain/d339d31f5a5ebfc:/x11/gtkextra3/Portfile

 If you're OK with the Portfile, I'd commit it like that, after test-
 building it on my system (which may take a while due to other updates.)

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Ticket URL: <https://trac.macports.org/ticket/45781#comment:15>
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