[MacPorts] #28166: New port: xhtml1

[MacPorts]

#28166: New port: xhtml1
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 Reporter:  jclift@…           |       Owner:  macports-tickets@…                   
     Type:  submission         |      Status:  new                                  
 Priority:  Normal             |   Milestone:                                       
Component:  ports              |     Version:  1.9.2                                
 Keywords:                     |        Port:                                       
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 This port provides the XHTML1 DTDs required for validation of XHTML
 documents.

 It's pretty simple: Downloads the DTDs from the w3 website, untars them
 and moves into place, then updates the XML catalog file to point to them.

 Correctly removes the added XML catalog entries at uninstall time as well.
 (copied and docbook xml approach and modified accordingly)

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Ticket URL: <https://trac.macports.org/ticket/28166>
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