nvmf: Rescan namespaces after reconnecting

While a host was disconnected from a remote controller, namespaces
might have been added, removed, or altered properties.  Rescan the
namespaces after reconnecting to detect any such changes.

Reviewed by:	imp
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D45461

sys/dev/nvmf/host/nvmf.c

@@ -685,6 +685,8 @@ nvmf_reconnect_host(struct nvmf_softc *sc, struct nvmf_handoff_host *hh)
 			nvmf_reconnect_ns(sc->ns[i]);
 	}
 	nvmf_reconnect_sim(sc);
+
+	nvmf_rescan_all_ns(sc);
 out:
 	sx_xunlock(&sc->connection_lock);
 	nvmf_free_ivars(&ivars);