[MacPorts] #55039: port: not respecting all installation options

[MacPorts]

#55039: port: not respecting all installation options
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 Reporter:  kencu   |      Owner:
     Type:  defect  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:  2.4.2
 Keywords:          |       Port:
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 MacPorts previously respected all the install settings ( `--applications-
 dir= --with-curlprefix= ` being the two I generally use in addition to
 `--prefix`) , but the new version `2.4.2` does not  respect those when
 updating an existing installation. It does respect the previous `--prefix`
 setting, but not the others.

 This was noted on several different machines, all of which have two
 installations of MacPorts, one in `/opt/bootstrap` and the one in
 `/opt/local`

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Ticket URL: <https://trac.macports.org/ticket/55039>
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