[MacPorts] #14377: port lint shouldn't warn that master_sites is required when using a different fetch.type (was: port lint shouldn't warn that master_sites is required in cases when it isn't)

[MacPorts]

#14377: port lint shouldn't warn that master_sites is required when using a
different fetch.type
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  Reporter:  ryandesign@…             |       Owner:  macports-tickets@…                   
      Type:  defect                   |      Status:  closed                               
  Priority:  Normal                   |   Milestone:  MacPorts 1.7.0                       
 Component:  base                     |     Version:  1.7.0                                
Resolution:  fixed                    |    Keywords:                                       
      Port:                           |  
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Comment(by ryandesign@…):

 Another case where `master_sites` is being incorrectly reported as
 required is being handled in #18479.

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Ticket URL: <http://trac.macports.org/ticket/14377#comment:4>
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