[SAC] [OSGeo] #2868: Upgrade wiki.osgeo.org to MediaWiki 1.39.1

[OSGeo]

#2868: Upgrade wiki.osgeo.org to MediaWiki 1.39.1
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 Reporter:  robe           |       Owner:  sac@…
     Type:  task           |      Status:  new
 Priority:  normal         |   Milestone:  Sysadmin Contract 2023-I
Component:  Systems Admin  |  Resolution:
 Keywords:                 |
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Comment (by robe):

 As discussed on #2896 I seem to only be able to upgrade to 1.38 (done in
 staging) before the LDAP stops working.  Need to troubleshoot the LDAP
 issue with 1.39. before I can proceed with this.
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Ticket URL: <https://trac.osgeo.org/osgeo/ticket/2868#comment:1>
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