[MacPorts] #59834: Boost: refactor and enhance

[MacPorts]

#59834: Boost: refactor and enhance
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  Reporter:  michaelld    |      Owner:  mascguy
      Type:  enhancement  |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:  boost        |
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Comment (by RJVB):

 Replying to [comment:30 mascguy]:
 > Another good idea, suggested by @RJVB: Consider adding a `dev` variant,
 requesting headers be installed. When not requested, would eliminate
 installation of the many thousands of headers per Boost port installation.

 A variant, or a subport which would have some (theoretical) advantages for
 those who need the headers occasionally.

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Ticket URL: <https://trac.macports.org/ticket/59834#comment:33>
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