[MacPorts] #59439: php is overlinked to icu and libxml2's other dependencies

[MacPorts]

#59439: php is overlinked to icu and libxml2's other dependencies
------------------------+------------------------
 Reporter:  ryandesign  |      Owner:  ryandesign
     Type:  defect      |     Status:  assigned
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.6.2
 Keywords:              |       Port:  php
------------------------+------------------------
 Because php73 and earlier use xml2-config to locate libxml2, each of the
 php subports that use libxml2 are overlinked to libxml2's dependencies.
 php73 and earlier should be patched to use pkg-config to locate libxml2
 instead. It looks like upstream [https://github.com/php/php-
 src/commit/cc930cdd75cc67f1f96177c0b24c2b1318680a78 already fixed this
 problem for php74]; maybe we can backport it to earlier versions.

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Ticket URL: <https://trac.macports.org/ticket/59439>
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