[MacPorts] #56048: Evaluate replacing getopt with pure-getopt in mpbb to avoid getopt dependency in Travis CI

[MacPorts]

#56048: Evaluate replacing getopt with pure-getopt in mpbb to avoid getopt
dependency in Travis CI
----------------------------+------------------------
  Reporter:  neverpanic     |      Owner:  neverpanic
      Type:  enhancement    |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  buildbot/mpbb  |    Version:
Resolution:                 |   Keywords:
      Port:                 |
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Comment (by cooljeanius):

 MacPorts no longer uses Travis for CI, but this issue is still around for
 the GitHub Actions CI, too, so, confirmed.

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Ticket URL: <https://trac.macports.org/ticket/56048#comment:1>
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