getroute: fix help message to get arg order correct, include riskfactor.

Closes: #38
Reported-by: Glenn Willen
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

daemon/pay.c

@@ -285,7 +285,7 @@ static void json_getroute(struct command *cmd,
 const struct json_command getroute_command = {
 	"getroute",
 	json_getroute,
-	"Return route for {msatoshi} to {id}",
+	"Return route to {id} for {msatoshi}, using {riskfactor}",
 	"Returns a {route} array of {id} {msatoshi} {delay}: msatoshi and delay (in blocks) is cumulative."
 };