fix #5599 apply patch

git-svn-id: https://svn.osgeo.org/gdal/trunk@27573 f0d54148-0727-0410-94bb-9a71ac55c965
GML: parse correctly GML geometries whose srsDimension attribue is on top-level geometry element and not on posList (#5606)

git-svn-id: https://svn.osgeo.org/gdal/trunk@27576 f0d54148-0727-0410-94bb-9a71ac55c965
Merge remote-tracking branch 'osgeo/trunk' into rwmutex_block
Remove some commented out code