[MacPorts] #59639: Docs: extract keyword "use_dmg" seems undocumented

[MacPorts]

#59639: Docs: extract keyword "use_dmg" seems undocumented
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  Reporter:  lhaeger      |      Owner:  (none)
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  guide        |    Version:
Resolution:               |   Keywords:  use_dmg
      Port:               |
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Changes (by jmroot):

 * type:  request => enhancement
 * component:  website => guide


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Ticket URL: <https://trac.macports.org/ticket/59639#comment:1>
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