[Live-demo] [OSGeo] #982: Upgrade sphinx environment to support linkcheck build goal

[OSGeo]

#982: Upgrade sphinx environment to support linkcheck build goal
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 Reporter:  fgdrf         |       Owner:  live-demo@…
     Type:  enhancement   |      Status:  new
 Priority:  normal        |   Milestone:  OSGeoLive10.5
Component:  LiveDVD       |  Resolution:
 Keywords:  docs, sphinx  |
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Changes (by kalxas):

 * milestone:  OSGeoLive10.0 => OSGeoLive10.5


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Ticket URL: <https://trac.osgeo.org/osgeo/ticket/982#comment:6>
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