Update to 2.4.0
- Update MASTER_SITES
Changes: https://trac.osgeo.org/gdal/wiki/Release/2.3.0-News
https://trac.osgeo.org/gdal/wiki/Release/2.3.1-News https://trac.osgeo.org/gdal/wiki/Release/2.3.2-News https://trac.osgeo.org/gdal/wiki/Release/2.3.3-News https://trac.osgeo.org/gdal/wiki/Release/2.4.0-News
PR: 231629
Exp-run by: antoine