[MacPorts] #46405: htcondor @8.2.3_0: replace all Python variants with +python{27, 34}

[MacPorts]

#46405: htcondor @8.2.3_0: replace all Python variants with +python{27,34}
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  Reporter:  larryv@…     |      Owner:  aronnax@…
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:  haspatch
      Port:  htcondor     |
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Comment (by larryv@…):

 If we just remove the obsolete variants, users won’t be migrated to the
 correct replacement variant — they’ll just end up with the default.
 Someone with `@8.2.3_0+python31` installed would get “upgraded” to
 `@8.2.3_1+python27`, which is not what we want.

 The standard method is to make the retired variant a stub that requires
 the replacement variant. After giving users a year or so to upgrade to the
 replacement, the retired variant can be removed altogether.

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Ticket URL: <https://trac.macports.org/ticket/46405#comment:3>
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