[MacPorts] #50671: boost: Update to 1.63.0

[MacPorts]

#50671: boost: Update to 1.63.0
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  Reporter:  eborisch  |      Owner:  ryandesign
      Type:  update    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.3.4
Resolution:            |   Keywords:  haspatch
      Port:  boost     |
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Comment (by michaelld):

 I know little about why Boost patches are in place. I can see from the
 Portfile comments that at last some portion of the patches were integrated
 into Boost a while back, but clearly not all of them. In my belief, if the
 patches can still be applied then they should continue to be used, that
 there's a reason they are there in the first place & are highly likely to
 continue to be needed.

 That said, if folks want to do testing by commenting out any specific
 patch then I'd welcome feedback as to if/how that worked. I don't have
 time to do this just right now.

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Ticket URL: <https://trac.macports.org/ticket/50671#comment:29>
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