[MacPorts] #32805: Update rtmpdump to version 2.4

[MacPorts]

#32805: Update rtmpdump to version 2.4
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 Reporter:  feranick@…            |       Owner:  macports-tickets@…                   
     Type:  defect                |      Status:  new                                  
 Priority:  Normal                |   Milestone:                                       
Component:  ports                 |     Version:  2.0.3                                
 Keywords:                        |        Port:  rtmpdump                             
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 Rtmpdump 2.4 has been released, with bug fixes.

 http://rtmpdump.mplayerhq.hu/

 The new version is needed for the correct working of other ports,
 including youtube-dl.

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Ticket URL: <https://trac.macports.org/ticket/32805>
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