[MacPorts] #40655: Implement proc handle_option-prepend

[MacPorts]

#40655: Implement proc handle_option-prepend
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 Reporter:  ryandesign@…  |      Owner:  macports-tickets@…
     Type:  enhancement   |     Status:  new
 Priority:  Normal        |  Milestone:  MacPorts Future
Component:  base          |    Version:
 Keywords:  haspatch      |       Port:
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 Here's a patch to implement proc `handle_option-prepend` whose
 functionality was [https://lists.macosforge.org/pipermail/macports-
 dev/2013-October/024527.html proposed on the list].

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Ticket URL: <https://trac.macports.org/ticket/40655>
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