'Wait for the user to modify the request. After editing the request the
code should call on_edited_request.
:param http_request: A w3af HTTP request instance
:return: An HTTP response'

def on_start_edit_request(self, http_request):

    self.parent_process.requests_pending_modification.put(http_request)
    return self.parent_process.requests_already_modified.get()
