'Setup the grep consumer:
* Create a Queue,
* Set the Queue in xurllib
* Start the consumer'

def _setup_grep(self):

    grep_plugins = self._w3af_core.plugins.plugins['grep']
    if grep_plugins:
        self._grep_consumer = grep(grep_plugins, self._w3af_core)
        grep_qput = self._grep_consumer.in_queue_put
        self._w3af_core.uri_opener.set_grep_queue_put(grep_qput)
        self._grep_consumer.start()
