[MacPorts] #31382: hdf5-18: Add license info; move szip into variant

[MacPorts]

#31382: hdf5-18: Add license info; move szip into variant
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  Reporter:  eborisch@…             |       Owner:  mmoll@…           
      Type:  enhancement            |      Status:  closed            
  Priority:  Normal                 |   Milestone:                    
 Component:  ports                  |     Version:                    
Resolution:  fixed                  |    Keywords:  haspatch          
      Port:  hdf5-18                |  
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Comment(by jmr@…):

 Note that the braces around the license names here are unnecessary. They
 create a sublist, which indicates that any one of the licenses inside may
 be chosen. This is of course pointless when there is only one license.

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Ticket URL: <https://trac.macports.org/ticket/31382#comment:8>
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