doc: add some precision about gdaladdo -clean not shrinking file (#4940)

git-svn-id: https://svn.osgeo.org/gdal/trunk@25434 f0d54148-0727-0410-94bb-9a71ac55c965
SQLite: implement minimalistic set of spatial functions if Spatialite isn't available

git-svn-id: https://svn.osgeo.org/gdal/trunk@25435 f0d54148-0727-0410-94bb-9a71ac55c965
SQLite: some VirtualOGR adjustments

git-svn-id: https://svn.osgeo.org/gdal/trunk@25436 f0d54148-0727-0410-94bb-9a71ac55c965
VirtualOGR: fix quoting issue in translation of where clause to attribute filter

git-svn-id: https://svn.osgeo.org/gdal/trunk@25437 f0d54148-0727-0410-94bb-9a71ac55c965
VirtualOGR: fix memory leak in error code path

git-svn-id: https://svn.osgeo.org/gdal/trunk@25438 f0d54148-0727-0410-94bb-9a71ac55c965