[SAC] [OSGeo] #1577: Upgrade Mailman to recent 2.1.20 version

[OSGeo]

#1577: Upgrade Mailman to recent 2.1.20 version
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 Reporter:  jmckenna       |       Owner:  sac@…
     Type:  task           |      Status:  closed
 Priority:  normal         |   Milestone:
Component:  Systems Admin  |  Resolution:  fixed
 Keywords:  Mailman        |
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Changes (by strk):

 * status:  new => closed
 * resolution:   => fixed


Comment:

 2.1.20 is running.

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Ticket URL: <https://trac.osgeo.org/osgeo/ticket/1577#comment:4>
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