[MacPorts] #19498: optipng security patch and improvements

[MacPorts]

#19498: optipng security patch and improvements
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 Reporter:  jmr@…             |       Owner:  vincent-opdarw@…         
     Type:  update            |      Status:  new                      
 Priority:  Normal            |   Milestone:                           
Component:  ports             |     Version:  1.7.1                    
 Keywords:                    |        Port:  optipng                  
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 Patches apply an upstream security fix, and switch to using the configure
 script and top-level makefile so configure.cc is picked up.

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Ticket URL: <http://trac.macports.org/ticket/19498>
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