[MacPorts] #15712: Add versions to platforms

[MacPorts]

#15712: Add versions to platforms
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  Reporter:  raimue       |      Owner:  larryv
      Type:  enhancement  |     Status:  assigned
  Priority:  Normal       |  Milestone:  MacPorts 2.7.0
 Component:  base         |    Version:
Resolution:               |   Keywords:
      Port:               |
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Comment (by janstary):

 I like "broken" more than "blacklist" because "blacklist" seems to imply
 we intentionally don't want it, as opposed to "broken".

 At any rate, we should enumerate the bad, not the good;
 it should be understood that the port just works if it does not say
 anything.

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Ticket URL: <https://trac.macports.org/ticket/15712#comment:42>
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