[MacPorts] #20029: chicken: update to version 4.0.0

[MacPorts]

#20029: chicken: update to version 4.0.0
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 Reporter:  lkraider+ports@…          |       Owner:  arto.bendiken@…        
     Type:  update                    |      Status:  new                    
 Priority:  Normal                    |   Milestone:                         
Component:  ports                     |     Version:  1.7.1                  
 Keywords:                            |        Port:  chicken                
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Comment(by ivan.g.raikov@…):

 Chicken 4.1.0 has been released, attached is a Portfile patch for it.

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Ticket URL: <http://trac.macports.org/ticket/20029#comment:3>
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