Pullup ticket #5391 - requested by sevan
net/vnc: build fix

Revisions pulled up:
- net/vnc/Makefile                                              1.56

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  Module Name:    pkgsrc
  Committed By:  darcy
  Date:          Sun Apr 30 14:37:40 UTC 2017

  Modified Files:
          pkgsrc/net/vnc: Makefile

  Log Message:
  Old web site didn't work.  Here is one that does.

(bsiegert)