[MacPorts] #71312: Stop using xml-security-c

[MacPorts]

#71312: Stop using xml-security-c
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  Reporter:  scantor                             |      Owner:  (none)
      Type:  defect                              |     Status:  new
  Priority:  Normal                              |  Milestone:
 Component:  ports                               |    Version:
Resolution:                                      |   Keywords:
      Port:  xml-security-c, wt, opensaml,       |
  shibboleth, xmltooling                         |
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Comment (by scantor):

 Was hoping my three Shibboleth ports might be almost all of them using
 this, looks like that's close to true.

 I have no qualms about pulling xmltooling/opensaml/shibboleth outright if
 that's helpful, and gets us close to being able to pull this one.

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Ticket URL: <https://trac.macports.org/ticket/71312#comment:2>
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