[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-
                                                 |  tickets@…
      Type:  update                              |     Status:  new
  Priority:  Normal                              |  Milestone:
 Component:  ports                               |    Version:
Resolution:                                      |   Keywords:
      Port:  virtualbox virtualbox-extension-    |
  pack virtualbox-guest-additions                |
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Comment (by socratisk):

 I just posted an update about this on #50622 if you're interested. I think
 that this ticket is way too old and should be closed(?) as obsolete(?) and
 let the discussion continue in #50622. I don't see backporting 4.3.x
 happening any time soon...

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Ticket URL: <https://trac.macports.org/ticket/40786#comment:30>
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