Fix sxf layers name encoding

git-svn-id: https://svn.osgeo.org/gdal/trunk@26786 f0d54148-0727-0410-94bb-9a71ac55c965
Fix memory leaks and naming conventions (#4331)

git-svn-id: https://svn.osgeo.org/gdal/trunk@26787 f0d54148-0727-0410-94bb-9a71ac55c965


git-svn-id: https://svn.osgeo.org/gdal/trunk@26788 f0d54148-0727-0410-94bb-9a71ac55c965
OGRLinearRing::isClockwise(): make it work in a degenerated case when a vertex is used several times in the vertex list (#5342)

git-svn-id: https://svn.osgeo.org/gdal/trunk@26789 f0d54148-0727-0410-94bb-9a71ac55c965