hs: Note the connection attempt if descriptor is unusable

This way, we can clear off the directory requests from our cache and thus
allow the next client to query those HSDir again at the next SOCKS connection.

Signed-off-by: David Goulet <dgoulet@torproject.org>

src/or/hs_client.c

@@ -1103,7 +1103,9 @@ hs_client_desc_has_arrived(const hs_ident_dir_conn_t *ident)
                         "Closing streams.");
       connection_mark_unattached_ap(entry_conn,
                                     END_STREAM_REASON_RESOLVEFAILED);
-      /* XXX: Note the connection attempt. */
+      /* We are unable to use the descriptor so remove the directory request
+       * from the cache so the next connection can try again. */
+      note_connection_attempt_succeeded(edge_conn->hs_ident);
       goto end;
     }