[MacPorts] #56975: livecheck broken in GitHub PortGroup

[MacPorts]

#56975: livecheck broken in GitHub PortGroup
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  Reporter:  l2dy    |      Owner:  (none)
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:          |
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Comment (by cjones051073):

 It seems things are even more complicated. Whilst the above largely fixes
 most ports using the GitHub port group, it has cased issues with others,
 such as those fetching from source forge. The issue here is the feed
 checked is rss and adding the "Accept: text/html" header breaks these
 fetch.

 {{{
 > curl -H"Accept: text/html" https://sourceforge.net/projects/expat/rss
 project_rss
 >
 }}}

 So it seems more flexibility is required here...

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Ticket URL: <https://trac.macports.org/ticket/56975#comment:6>
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