Report to the user suspended engines.
searx.search.processor.abstract:
* manages suspend time (per network).
* reports suspended time to the ResultContainer (method extend_container_if_suspended)
* adds the results to the ResultContainer (method extend_container)
* handles exceptions (method handle_exception)
see searx.search.processors.abstract.EngineProcessor
First the method searx call the get_params method.
If the return value is not None, then the searx call the method search.
