I found next problem. In following multiserver setup:
server 1 services: web, ftp, mysql
server 2 services: web, ftp, mysql
client 1: default web server 1, default mysql server 1
I want client 1 to have website on both servers. As client I cannot create website on server 2 because of default web server is server 1. So I create web as admin. Now client has website on server 2 although he cannot change setting of this website.
Now I want to create database for website on server 2 as I have permission for this as the client. But when I create database even for website on server 2 database is created on server 1 because it is default mysql server.
There should be more granularity for multiserver settings .. at least:
1) more default web servers for client and reseller
2) ability to assign mysql server to the web server
I can create all as admin but when client has rights to create mysql database on bad server it is problem which certainly occurs.