[MacPorts] #25811: upgrade autoconf

[MacPorts]

#25811: upgrade autoconf
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 Reporter:  snc@…             |       Owner:  ram@…           
     Type:  update            |      Status:  new             
 Priority:  Normal            |   Milestone:                  
Component:  ports             |     Version:                  
 Keywords:                    |        Port:  autoconf        
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 2.66 is out. Attached is naïve diff.

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Ticket URL: <http://trac.macports.org/ticket/25811>
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