getinfo: remove testnet flag and have network flag instead.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

lightningd/jsonrpc.c

@@ -241,7 +241,8 @@ static void json_getinfo(struct command *cmd,
 	/* FIXME: Keep netaddrs and list them all. */
 	if (cmd->dstate->portnum)
 		json_add_num(response, "port", cmd->dstate->portnum);
-	json_add_bool(response, "testnet", cmd->dstate->testnet);
+	json_add_string(response, "network",
+			ld_from_dstate(cmd->dstate)->chainparams->network_name);
 	json_add_string(response, "version", version());
 	json_add_num(response, "blockheight",
 		     get_block_height(cmd->dstate->topology));