'Add a service\'s server to the proxy table.'

@gen.coroutine
def add_service(self, service, client=None):

    if (not service.server):
        raise RuntimeError('Service    %s    does    not    have    an    http    endpoint    to    add    to    the    proxy.', service.name)
    self.log.info('Adding    service    %s    to    proxy    %s    =>    %s', service.name, service.proxy_spec, service.server.host)
    (yield self.add_route(service.proxy_spec, service.server.host, {'service': service.name}))
