[MacPorts] #40794: grass @6.4.3: upgrade postgresql variants

[MacPorts]

#40794: grass @6.4.3: upgrade postgresql variants
-----------------------------+--------------------------------
 Reporter:  Peter.Danecek@…  |      Owner:  macports-tickets@…
     Type:  enhancement      |     Status:  new
 Priority:  Normal           |  Milestone:
Component:  ports            |    Version:
 Keywords:                   |       Port:
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 This is a request to upgrade the postgresql variants a bit and provide
 variants +postgresql92 and (maybe) +postgresql93, the first becoming the
 default. This is particularly interesting because other ports now default
 to +postgresql92. So the current situation is a bit messy and one would
 and up with two postgresql versions by default. +postgresql93 might become
 more relevant in future. To my understanding  postgresql83 is not
 maintained any more.

 From the grass webpage I see no clear indications nor contraindications
 about which versions exactly are compatible.

 {{{
 grass @6.4.3 (gis)
 Variants:             ffmpeg, mysql5, postgresql83, postgresql84,
 postgresql90,
                       postgresql91, sqlite3, universal, wxPython,
 wxwidgets
 }}}

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Ticket URL: <https://trac.macports.org/ticket/40794>
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