Slightly modified merge of commit [1cb1d3ac] from searx [PR 2543]:
This adds Docker Hub .. as a search engine .. the engine's favicon was
downloaded from the Docker Hub website with wget and converted to a PNG
with ImageMagick .. It supports the parsing of URLs, titles, content,
published dates, and thumbnails of Docker images.
[1cb1d3ac] https://github.com/searx/searx/pull/2543/commits/1cb1d3ac
[PR 2543] https://github.com/searx/searx/pull/2543
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
