MINOR: receiver: link the receiver to its settings

Just like listeners keep a pointer to their bind_conf, receivers now also
have a pointer to their rx_settings. All those belonging to a listener are
automatically initialized with a pointer to the bind_conf's settings.

include/haproxy/receiver-t.h

@@ -47,6 +47,7 @@ struct receiver {
 	int fd;                          /* handle we receive from (fd only for now) */
 	unsigned int flags;              /* receiver options (RX_F_*) */
 	struct protocol *proto;          /* protocol this receiver belongs to */
+	struct rx_settings *settings;    /* points to the settings used by this receiver */
 	struct list proto_list;          /* list in the protocol header */
 	/* warning: this struct is huge, keep it at the bottom */
 	struct sockaddr_storage addr;    /* the address the socket is bound to */

src/listener.c

@@ -563,7 +563,7 @@ int create_listeners(struct bind_conf *bc, const struct sockaddr_storage *ss,
 		LIST_ADDQ(&bc->frontend->conf.listeners, &l->by_fe);
 		LIST_ADDQ(&bc->listeners, &l->by_bind);
 		l->bind_conf = bc;
-
+		l->rx.settings = &bc->settings;
 		l->rx.fd = fd;
 		memcpy(&l->rx.addr, ss, sizeof(*ss));
 		MT_LIST_INIT(&l->wait_queue);