Fix read GeoJSON error in russian locale (#5461)

git-svn-id: https://svn.osgeo.org/gdal/trunk@27294 f0d54148-0727-0410-94bb-9a71ac55c965
Change migration guide versions

git-svn-id: https://svn.osgeo.org/gdal/trunk@27295 f0d54148-0727-0410-94bb-9a71ac55c965
Merge branch 'trunk' of git://github.com/OSGeo/gdal into unification
Add section for 1.11->2.0 in migration guide