for some reason Calib3d_Homography.fromImages on ARM gives much smaller number of inliers than on x86/x64. Need to investigate more carefully, but let's decrease the tolerance threshold for now

int pix_per_thr = l_counter / LOCAL_TOTAL + ((lid < mod) ? 1 : 0);
The pix_per_thr * LOCAL_TOTAL may be larger than l_counter.
Thus the index of l_stack may be negative which may cause serious
problems. Let's skip the loop when we get negative index and we need
to add back the lcounter to keep its balance and avoid potential
negative counter.
Signed-off-by: Zhigang Gong <zhigang.gong@intel.com>

hack solvePoly to finds roots of polynoms with zero higher-order coefficients. The roots are populated in this case, which is not valid, strictly speaking, but good enough for function like correctMatches. This solves http://code.opencv.org/issues/4330

added tests for http://code.opencv.org/issues/4011 and http://code.opencv.org/issues/3057; fixed random subset generation in both methods to increase chance for a good subset

Conflicts:
	modules/highgui/src/grfmt_tiff.cpp

floodfill return value removed

Install symlinks to shared libraries as a part of development package,
not runtime package.

It is default behavior for debian packages.

Conflicts:
	modules/highgui/src/cap_ffmpeg_impl.hpp

Some TIFF images consist of only one strip. The magic value 2**32-1 for the
"rows per strip" tag reflects that fact, effectively meaning "infinite".

Conflicts:
	modules/highgui/src/grfmt_tiff.cpp
	modules/highgui/test/test_grfmt.cpp

fix whitespace

fix compile error

Conflicts:
	modules/features2d/src/draw.cpp

Conflicts:
	modules/highgui/src/cap_ffmpeg_impl.hpp

Conflicts:
	modules/gpu/doc/per_element_operations.rst

tiff test fixed

(cherry picked from commit e650d87e)
(cherry picked from commit ca9c52ac)

Conflicts:
	cmake/OpenCVPackaging.cmake

Fixed a memory leak in cap_dshow.cpp in videoInput::setVideoSettingCamera(). The leak was caused by not releasing an IBaseFilter object created in a call to getDevice(). Tho object is now properly released.

Conflicts:
	modules/highgui/src/cap_dshow.cpp