MRG: Merge bugfixes from 'release-6.4' into develop

Documentation/Cookbook/rst/FAQ.rst

Documentation/Cookbook/rst/Installation_Linux.txt

Documentation/Cookbook/rst/Installation_Macx.txt

Documentation/Cookbook/rst/Installation_Windows.txt

Documentation/Cookbook/rst/recipes/contrast_enhancement.rst

Documentation/SoftwareGuide/Latex/ContributorList.tex

Documentation/SoftwareGuide/Latex/Installation.tex

.../Applications/AppFiltering/app/otbContrastEnhancement.cxx

...tions/AppHyperspectral/app/otbVertexComponentAnalysis.cxx

Modules/Applications/AppImageUtils/app/otbExtractROI.cxx

.../Applications/AppProjection/app/otbOrthoRectification.cxx

...ons/AppStereo/app/otbStereoRectificationGridGenerator.cxx

...pplications/AppVectorUtils/app/otbVectorDataTransform.cxx

Modules/Filtering/Contrast/include/otbComputeGainLutFilter.h

...Learning/LearningBase/include/otbMachineLearningModel.txx

...rning/Sampling/include/otbOGRDataToSamplePositionFilter.h

...ing/Sampling/include/otbOGRDataToSamplePositionFilter.txx

...arning/Sampling/include/otbPersistentSamplingFilterBase.h

...ning/Sampling/include/otbPersistentSamplingFilterBase.txx

...MPI/MPITiffWriter/include/otbSimpleParallelTiffWriter.txx