[MacPorts] #52478: opensc @0.16.0: integrate with p11-kit

[MacPorts]

#52478: opensc @0.16.0: integrate with p11-kit
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 Reporter:  leonardo.schenkel@…  |      Owner:  macports-tickets@…
     Type:  enhancement          |     Status:  new
 Priority:  Normal               |  Milestone:
Component:  ports                |    Version:  2.3.4
 Keywords:  maintainer haspatch  |       Port:  opensc
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 I'm attaching a patch that registers a opensc module in
 `${prefix}/share/p11-kit/modules` so opensc will be automatically
 discovered by p11-kit.

 I also introduced a new variant `+p11kit` (not enabled by default) that
 adds a runtime dependency to p11-kit and changes the module `pkcs11-tool`
 uses by default to the `p11-kit` module.

 To the unfamiliar with `p11-kit`, it is a library with the purpose to
 enumerate and load all PKCS#11 modules in the system. Programs can link to
 `p11-kit` directly but `p11-kit` is also a PKCS#11 module itself, which
 allows it to be used by any program that supports loading such modules.

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Ticket URL: <https://trac.macports.org/ticket/52478>
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