* [OpenCV] update to v4
* [OpenCV] update to v4.1
* [OpenCV] merge #6901 and #6812
* [OpenCV] port patches to v4.1
* [OpenCV] fix naming
* [OpenCV] fix regression with static linkage
* [OpenCV] fix linking to optional feature dependencies in static mode
* fix ffmpeg on some architectures
* trigger rebuild of regressions on macOS
* [zxing-cpp] fix opencv 4.1 compat
* [ogre] improve patching for static builds
* [OpenCV] fixes for extra features
* [OpenCV] drastically reduce patchset
* [OpenCV] fix regression on linux
* [OpenCV] fix regression on Windows
* [qt5] depends on qt5-activeqt only on windows
* update to v4.1.1
* [OpenCV] additional fixes for 4.1.1
* [OpenCV] fix Eigen3 feature integration
* [opencv] Fix compilation in UWP
* [opencv] Fix merge conflicts
* [ffmpeg] fix cmake module for osx
* [OpenCV] add pre-caching of optflow cuda package
* [gdcm] properly fix#6863 instead of wrong #6901
* [OpenCV] fix OpenMP feature
* [opencv] Add missing GetModuleHandle() call guard for UWP
* [freeimage] Do not depend on libwebp[all] on UWP
* [opencv] Set app container bit for UWP
* [zxing-cpp] Fail with explicit message in UWP
* [pthreads4w] fix target creation, missing dlls
* [pthreads4w] bump CONTROL
* [opencv,zxing-cpp] Fix OpenCV Video IO module
* [zxing-cpp] Revert unnecessary changes
* [opencv] Feature halide
* Fix regression in UWP
* [ffmpeg] remove unnecessary patch pointing to old OpenCV version
* [opencv] remove versioning from windows dll filenames
* [opencv] Move port to opencv4
* [opencv,opencv4] Make meta-package install OpenCV 4.1
* [opencv3] Rename old port opencv->opencv3
* Add failure messages when another OpenCV is already installed
* [pthreads4W] restore compatibility with projects using pthreads v2, set proper VERSION symbol
* [pthreads4W] remove FORCED cached variables, to enable user override
* [pthread] update to v3
* [flint, mosquitto, usbmuxd] bump CONTROL files and add final touches for PThreads4W v3
* [arb] add compatibility with PThreads4W
