[fix] follow up of PR-1856

- `` url: false`` breaks with existing installations
  e92755d358 (r89577339)

- PR-1856: https://github.com/searxng/searxng/pull/1856

- Comments from review: https://github.com/searxng/searxng/pull/1856#pullrequestreview-1176402810

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/webapp.py

@@ -120,7 +120,7 @@ from searx.locales import (
 # renaming names from searx imports ...
 from searx.autocomplete import search_autocomplete, backends as autocomplete_backends
 from searx.languages import language_codes as languages
-from searx.shared.redisdb import initialize as redis_initialize
+from searx.shared import redisdb
 from searx.search import SearchWithPlugins, initialize as search_initialize
 from searx.network import stream as http_stream, set_context_network_name
 from searx.search.checker import get_result as checker_get_result
@@ -1385,7 +1385,7 @@ werkzeug_reloader = flask_run_development or (searx_debug and __name__ == "__mai
 if not werkzeug_reloader or (werkzeug_reloader and os.environ.get("WERKZEUG_RUN_MAIN") == "true"):
     locales_initialize()
     _INFO_PAGES = infopage.InfoPageSet()
-    redis_initialize()
+    redisdb.init()
     plugin_initialize(app)
     search_initialize(enable_checker=True, check_network=True, enable_metrics=settings['general']['enable_metrics'])