[postgis-tickets] [PostGIS] #2382: Can't upgrade postgis ERROR: attempt to redefine parameter "postgis.backend"

[PostGIS]

#2382: Can't upgrade postgis ERROR: attempt to redefine parameter
"postgis.backend"
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 Reporter:  robe                   |       Owner:  pramsey      
     Type:  defect                 |      Status:  new          
 Priority:  blocker                |   Milestone:  PostGIS 2.2.0
Component:  build/upgrade/install  |     Version:  trunk        
 Keywords:                         |  
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Comment(by pramsey):

 First fix attempt committed at r12350. This will need to be checked
 against all our PostgreSQL supported versions, since it calls deep into
 the guts of the server for information on what GUCs are already defined.

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/2382#comment:22>
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