[MacPorts] #53322: port does not honor variants in variants.conf

[MacPorts]

#53322: port does not honor variants in variants.conf
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  Reporter:  mf2k    |      Owner:
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  base    |    Version:  2.3.99
Resolution:          |   Keywords:
      Port:          |
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Comment (by mf2k):

 2 ports with python variants that get {{{+python27}}} instead of
 {{{+python35}}} are xorg-libxcb and xorg-xcb-proto.

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Ticket URL: <https://trac.macports.org/ticket/53322#comment:1>
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