[MacPorts] #44197: launch4j: update to 3.4 and tidy portfile

[MacPorts]

#44197: launch4j: update to 3.4 and tidy portfile
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  Reporter:  steve+macports@…  |      Owner:  panayotis@…
      Type:  update            |     Status:  new
  Priority:  Normal            |  Milestone:
 Component:  ports             |    Version:
Resolution:                    |   Keywords:
      Port:  launch4j          |
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Comment (by steve+macports@…):

 OK thanks, will do.

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Ticket URL: <https://trac.macports.org/ticket/44197#comment:3>
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