[MacPorts] #15558: Provide quartz-only variant of cairo port

[MacPorts]

#15558: Provide quartz-only variant of cairo port
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  Reporter:  macports at flyn.org  |       Owner:  ryandesign at macports.org
      Type:  enhancement        |      Status:  new                    
  Priority:  Low                |   Milestone:  Port Enhancements      
 Component:  ports              |     Version:  1.6.0                  
Resolution:                     |    Keywords:                         
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Comment (by ryandesign at macports.org):

 I wonder if we can roll this into the no_x11 variant. Or are there any
 cases where one would want the fontconfig backend but not the xlib
 backend? Hmm.

 FYI: The universal variant is not on by default and it has nothing to do
 with what cairo backends are enabled; see the
 [wiki:FAQ#IsMacPortsUniversal FAQ].

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Ticket URL: <http://trac.macports.org/ticket/15558#comment:2>
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