[MacPorts] #65063: bootstrapping Macports for curl now requires gcc7 and cmake (!) due to sneaked dependencies on brotli and nghttp2

[MacPorts]

#65063: bootstrapping Macports for curl now requires gcc7 and cmake (!) due to
sneaked dependencies on brotli and nghttp2
---------------------------+-----------------------------------------
  Reporter:  barracuda156  |      Owner:  ryandesign
      Type:  defect        |     Status:  closed
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.7.2
Resolution:  fixed         |   Keywords:  leopard, tiger, snowleopard
      Port:  curl          |
---------------------------+-----------------------------------------

Comment (by barracuda156):

 Thank you!

 `brotli` still requires `cmake-bootstrap`, but we can live with that.

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Ticket URL: <https://trac.macports.org/ticket/65063#comment:4>
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