[MacPorts] #53940: github port group: livecheck options to match latest stable release

[MacPorts]

#53940: github port group: livecheck options to match latest stable release
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  Reporter:  l2dy         |      Owner:
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:               |
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Comment (by l2dy):

 Replying to [comment:8 raimue]:
 > Has duplicate #56065.
 >
 > In the same direction, #56065 asks for an option to change the default
 regex for tags without exposing deep many details of the github port
 group. Seems like both could be solved with a set of new options:
 >
 > * `github.livecheck.page [releases|tags]`\\
 >   Not using `.url` as it is not supposed to be a full URL, but relative
 to the homepage at github. Defaults to `tags` for backwards
 compatibility.\\
 >   Implemented with `default livecheck.url
 ${github.homepage}/${github.livecheck.page}`.

 We need `${github.homepage}/releases/latest`, not
 `${github.homepage}/releases`. The latter is no different from tags
 because they both list all recent tags.

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Ticket URL: <https://trac.macports.org/ticket/53940#comment:9>
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