connectd: make failure message more descriptive

connectd/connectd.c

@@ -1428,7 +1428,7 @@ static void try_connect_peer(struct daemon *daemon,
 	* to retry; an address may get gossiped or appear on the DNS seed. */
 	if (tal_count(addrs) == 0) {
 		connect_failed(daemon, id, seconds_waited, addrhint,
-			       "No address known");
+			       "Unable to connect, no address known for peer");
 		return;
 	}
 

tests/test_connection.py

@@ -38,7 +38,7 @@ def test_connect(node_factory):
     assert len(l2.rpc.listpeers()) == 1
 
     # Should get reasonable error if unknown addr for peer.
-    with pytest.raises(RpcError, match=r'No address known'):
+    with pytest.raises(RpcError, match=r'Unable to connect, no address known'):
         l1.rpc.connect('032cf15d1ad9c4a08d26eab1918f732d8ef8fdc6abb9640bf3db174372c491304e')
 
     # Should get reasonable error if connection refuse.