Add interrupt callback with default timeout of 30s. Fixes #5730.
Add interrupt callback with default timeout of 30s. Fixes #5730.

Fix docs build failure by re-indenting with spaces instead of tabs.

Trailing whitespace fixes. http://pullrequest.opencv.org/buildbot/builders/precommit_docs/builds/5152/steps/whitespace/logs/stdio

mingw build fix.

opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv