[MacPorts] #27160: docbook-xsl: update to version 1.76.1

[MacPorts]

#27160: docbook-xsl: update to version 1.76.1
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 Reporter:  oksmith@…         |       Owner:  boeyms@…           
     Type:  update            |      Status:  new                
 Priority:  Normal            |   Milestone:                     
Component:  ports             |     Version:                     
 Keywords:                    |        Port:  docbook-xsl        
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Comment(by ryandesign@…):

 I am inclined to delete the +doc variant and make the port always install
 the documentation.

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Ticket URL: <https://trac.macports.org/ticket/27160#comment:6>
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