[SAC] [OSGeo] #2122: Travis/GitLab/Jenkins badges not shown anymore on postgis/geos trac wiki

[OSGeo]

#2122: Travis/GitLab/Jenkins badges not shown anymore on postgis/geos trac wiki
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 Reporter:  strk     |      Owner:  strk
     Type:  task     |     Status:  new
 Priority:  blocker  |  Milestone:
Component:  Trac     |   Keywords:
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 As reported in https://trac.osgeo.org/postgis/ticket/4019
 some badges are not shown anymore on PostGIS wiki since the recent
 upgrade.

 I found the problem being with

 {{{
 crossorigin="anonymous"
 }}}

 Attribute being added to the {{{img}}} tag. This is done by Trac itself
 because we surely haven't added that manually.

 Example showing the fix: https://trac.osgeo.org/test.html

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Ticket URL: <https://trac.osgeo.org/osgeo/ticket/2122>
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