Merge commit '43aec5ad' into merge-2.4

Conflicts:
	cmake/OpenCVConfig.cmake
	cmake/OpenCVLegacyOptions.cmake
	modules/contrib/src/retina.cpp
	modules/gpu/doc/camera_calibration_and_3d_reconstruction.rst
	modules/gpu/doc/video.rst
	modules/gpu/src/speckle_filtering.cpp
	modules/python/src2/cv2.cv.hpp
	modules/python/test/test2.py
	samples/python/watershed.py

modules/core/src/convert.cpp

@@ -1396,4 +1396,4 @@ CV_IMPL void cvNormalize( const CvArr* srcarr, CvArr* dstarr,
     cv::normalize( src, dst, a, b, norm_type, dst.type(), mask );
 }
 
-/* End of file. */
+/* End of file. */