[fdo-trac] #597: SHP provider registers custom functions on each connection

[FDO]

#597: SHP provider registers custom functions on each connection
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   Reporter:  waltweltonlair  |       Owner:  waltweltonlair
       Type:  defect          |      Status:  new           
   Priority:  major           |   Milestone:  3.4.0         
  Component:  FDO API         |     Version:  3.4.0         
   Severity:  3               |    Keywords:                
External_id:                  |  
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 Whenever we create a SHP connection the code will register custom
 functions with the expression engine.  For performance reasons this should
 only be done once.

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Ticket URL: <https://trac.osgeo.org/fdo/ticket/597>
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