[SAC] [OSGeo] #1671: [trac] Port notify.py local modification to newer version

[OSGeo]

#1671: [trac] Port notify.py local modification to newer version
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 Reporter:  strk           |      Owner:  sac@…
     Type:  task           |     Status:  new
 Priority:  normal         |  Milestone:
Component:  Systems Admin  |   Keywords:  trac
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 Reading https://wiki.osgeo.org/wiki/Trac_Instances#Local_Customizations I
 found out there were local modifications to the "notification.py" module
 of Trac to lookup emails of OSGeo users. I dubt this local modification
 was ported when trac was updated.

 Frank: what was the local modification useful for ? How to test if it
 works ?

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Ticket URL: <https://trac.osgeo.org/osgeo/ticket/1671>
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