[MacPorts] #26568: Updated yap portfile

[MacPorts]

#26568: Updated yap portfile
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 Reporter:  pmoura@…             |       Owner:  macports-tickets@…                   
     Type:  update               |      Status:  new                                  
 Priority:  Normal               |   Milestone:                                       
Component:  ports                |     Version:  1.9.1                                
 Keywords:  haspatch maintainer  |        Port:  yap                                  
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Comment(by pmoura@…):

 I'm afraid this is just an initial set of variants that don't cover all
 the the possible configuration options. YAP is widely used in the area of
 Logic Programming research and supports a large set of optional packages.
 I only defined variants for the most commonly used optional packages. I
 didn't add descriptions to the variants are their name is quite
 descriptive for YAP users. I will correct the error with the variant name
 after this reply. I'm going to contact the YAP main developer and ask him
 about which variants are useful to define. Please hold the commit of this
 portfile and of the "yap-devel" portfile for a couple of days until I sort
 this out.

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Ticket URL: <https://trac.macports.org/ticket/26568#comment:3>
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