This is an old and grumpy hack / SearXNG is a Flask application with
client/server structure, which can't be turned into a command line tool the way
it was done here.
Maintaining this hack is becoming increasingly complex the more we try to
remodel the core code, which is why we should now remove the hack from SearXNG.
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>