'Re-queues the link in the media scraper.'

@noresponse(VUser(), VModhash(), VSrCanAlter('id'), thing=VByName('id'))
def POST_rescrape(self, thing):

    if (not isinstance(thing, Link)):
        return
    media_cache.MediaByURL.add_placeholder(thing.url, autoplay=False)
    amqp.add_item('scraper_q', thing._fullname)
