[MacPorts] #57902: LibVNCServer @0.9.11: update to 0.9.12

[MacPorts]

#57902: LibVNCServer @0.9.11: update to 0.9.12
---------------------------+------------------------
  Reporter:  l2dy          |      Owner:  ryandesign
      Type:  update        |     Status:  accepted
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:
Resolution:                |   Keywords:  security
      Port:  LibVNCServer  |
---------------------------+------------------------
Changes (by ryandesign):

 * status:  assigned => accepted


Comment:

 Yes, I saw that this update is available, however they have switched to
 the cmake build system so it is not as simple as just updating the
 `version` and `checksums`.

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Ticket URL: <https://trac.macports.org/ticket/57902#comment:1>
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