Fix various typos found by Debian lintian tool (patch by Bas Couwenger, #5756)

git-svn-id: https://svn.osgeo.org/gdal/trunk@28039 f0d54148-0727-0410-94bb-9a71ac55c965
Make sure to test GDALGridInverseDistanceToAPower2NoSmoothingNoSearchSSE even if AVX is available

git-svn-id: https://svn.osgeo.org/gdal/trunk@28040 f0d54148-0727-0410-94bb-9a71ac55c965
Merge branch 'trunk' into trunk_travis_macosx