Commit 4cdcdc2 changed the format of `list` output. Before that commit,
the json keys were containing full URIs (scheme://host/path[:port]),
but afterward, the keys were only containing the path component.
With this commit, the `list` operation now returns full URIs (fixing the
regression), and also fixes the malformed URIs issue when a port is
specified (introduced by 19ec1c3, and affecting >=v0.4.2,<v0.9.0).
Signed-off-by: Albin Kerouanton <albinker@gmail.com>