[MacPorts] #25572: Update claws-mail to version 3.7.6

[MacPorts]

#25572: Update claws-mail to version 3.7.6
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 Reporter:  rechner@…            |       Owner:  macports-tickets@…                   
     Type:  update               |      Status:  new                                  
 Priority:  Normal               |   Milestone:                                       
Component:  ports                |     Version:  1.9.1                                
 Keywords:                       |        Port:                                       
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 A minor version update.

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Ticket URL: <http://trac.macports.org/ticket/25572>
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