[MacPorts] #54118: postgis2: Keep more old versions of postgresql9*

[MacPorts]

#54118: postgis2: Keep more old versions of postgresql9*
--------------------------+--------------------
  Reporter:  JDLH         |      Owner:  Veence
      Type:  enhancement  |     Status:  closed
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:  fixed        |   Keywords:
      Port:  postgis2     |
--------------------------+--------------------

Comment (by JDLH):

 How long does it take the fix to propagate. Just now, in my local Mac, I
 saw:


 {{{
 % sudo port selfupdate
 % port info postgis2
 postgis2 @2.4.2 (databases, gis)
 Variants:             comments, gui, [+]postgresql10, postgresql95,
 postgresql96, [+]raster, sfcgal, [+]topology, universal
 ....

 }}}

 Note the absence of variants `postgresql94`, `postgresql93`.

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Ticket URL: <https://trac.macports.org/ticket/54118#comment:6>
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