[MacPorts] #57698: Travis: Use the normal MacPorts installer

[MacPorts]

#57698: Travis: Use the normal MacPorts installer
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  Reporter:  ryandesign      |      Owner:  admin@…
      Type:  defect          |     Status:  new
  Priority:  Normal          |  Milestone:
 Component:  server/hosting  |    Version:
Resolution:                  |   Keywords:
      Port:                  |
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Comment (by ryandesign):

 Replying to [comment:7 l2dy]:
 > > Ok, so if we had a way of preventing selfupdate when using the pkg
 installer, we could use that?
 >
 > Sure. That's the only reason preventing us from using the pkg
 installers.

 I'll see what I can do about adding this to the installer pkg. I have some
 ideas.

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Ticket URL: <https://trac.macports.org/ticket/57698#comment:10>
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