[MacPorts] #28197: vrpn: update to 7.28

[MacPorts]

#28197: vrpn: update to 7.28
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 Reporter:  ryandesign@…             |       Owner:  sean@…         
     Type:  update                   |      Status:  new            
 Priority:  Normal                   |   Milestone:                 
Component:  ports                    |     Version:                 
 Keywords:                           |        Port:  vrpn           
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Comment(by sean@…):

 I'm having similar issues, including swig/python/libusb -- can't seem to
 get this port into a workable state.

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Ticket URL: <https://trac.macports.org/ticket/28197#comment:4>
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