[MacPorts] #55905: qgis: Update to 2.18.17

[MacPorts]

#55905: qgis: Update to 2.18.17
-------------------------+----------------------
  Reporter:  ryandesign  |      Owner:  Veence
      Type:  update      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:  haspatch
      Port:  qgis        |
-------------------------+----------------------

Comment (by Ryan Schmidt <git@…>):

 In [changeset:"56629204144b2f28919a668c943d1f76789087ea/macports-ports"
 56629204144b2f28919a668c943d1f76789087ea/macports-ports]:
 {{{
 #!ConfigurableCommitTicketReference repository="macports-ports"
 revision="56629204144b2f28919a668c943d1f76789087ea"
 qgis: Add GitHub handle to maintainers

 See: https://trac.macports.org/ticket/55905
 }}}

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Ticket URL: <https://trac.macports.org/ticket/55905#comment:4>
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