[MacPorts] #40786: virtualbox and sub-ports: update to 4.3

[MacPorts]

#40786: virtualbox and sub-ports: update to 4.3
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  Reporter:  mail@…                              |      Owner:  macports-
      Type:  update                              |  tickets@…
  Priority:  Normal                              |     Status:  new
 Component:  ports                               |  Milestone:
Resolution:                                      |    Version:
      Port:  virtualbox virtualbox-extension-    |   Keywords:
  pack virtualbox-guest-additions                |
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Comment (by petr@…):

 I just would like to ping here. Is there still someone working on this?

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Ticket URL: <https://trac.macports.org/ticket/40786#comment:25>
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