We have installed ISPConfig 3.1.1 on 5 servers in cluster mode (1 - ISPConfig web interface, 2 - DNS Servers, 1 - web server for hosting website and 1 database server). Before realizing it, all DNS zones were created in the /etc/bind directory. After the fact, we've found in the documentation that the location for zones could be defined. Is it possible to change the location in the System and also move the existing zone files to the new location? Are there any changes that need to be made manually? We would like all zones to reside in /var/cache/bind.