confd: call avahi-set-host-name on hostname changes

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

src/confd/src/confd/ietf-system.c

@@ -961,6 +961,7 @@ static int change_hostname(sr_session_ctx_t *session, uint32_t sub_id, const cha
 
 	/* Inform any running lldpd and avahi of the change ... */
 	systemf("lldpcli configure system hostname %s", nm);
+	systemf("avahi-set-host-name %s", nm);
 err:
 	if (nm)
 		free(nm);