schema fetch working!  Feature fetching still is not.

git-svn-id: https://svn.osgeo.org/gdal/trunk@26211 f0d54148-0727-0410-94bb-9a71ac55c965
enable GME if CURL is available

git-svn-id: https://svn.osgeo.org/gdal/trunk@26212 f0d54148-0727-0410-94bb-9a71ac55c965