+struct rconn *rconn_create(int txq_limit, int inactivity_probe_interval,
+ int max_backoff);
+int rconn_connect(struct rconn *, const char *name);
+void rconn_connect_unreliably(struct rconn *,
+ const char *name, struct vconn *vconn);
+void rconn_disconnect(struct rconn *);