o Minor bugfixes (relay): - In frac_nodes_with_descriptors(), add for_direct_connect, and replace node_has_any_descriptor() with node_has_preferred_descriptor(). Also, if we are using bridges and there is at least one bridge with a full descriptor, set f_guard in compute_frac_paths_available() to 1.0. Fixes bug 25886; bugfix on 0.3.5.1-alpha. Patch by Neel Chauhan.