Use the correct name for arti's addr_config.

lib/chutney/TorNet.py

@@ -2370,7 +2370,7 @@ state_dir = "{path}/arti/state"
 # implements it.
 enforce_distance = {{ "subnets_family_v4" = 33, "subnets_family_v6" = 129 }}
 
-[client_config]
+[addr_config]
 # Allow the client to accept requests to connect to e.g. 127.0.0.1
 allow_local_addrs = true