[MacPorts] #34667: tao @6.1.2 clean up Portfile

[MacPorts]

#34667: tao @6.1.2 clean up Portfile
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 Reporter:  lockhart@…              |       Owner:  macports-tickets@…                   
     Type:  enhancement             |      Status:  new                                  
 Priority:  Normal                  |   Milestone:                                       
Component:  ports                   |     Version:  2.1.1                                
 Keywords:  haspatch maintainer     |        Port:  tao                                  
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 The TAO Portfile has cruftiness in how variants are described. Clean this
 up based on detailed feedback from Ryan Schmidt.
 Will post patches after testing.

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Ticket URL: <https://trac.macports.org/ticket/34667>
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