Missing detailed documentation for mixed domain

In Configuration Guide -> Chapter 8. Domain Management -> 8.1.1. About the Domain Controller there is a note that EAP 7 domain controller can administer EAP 6 hosts and servers, but there is no detailed documentation.

Detailed documentation with description of some mixed domain specific configurations should be added.

What should be documented:

• DC must be always at latest version of EAPs available in domain slave
• hosts and servers must be JBoss EAP 6.2 or later (already mentioned in existing note)
• There is ignore-unused-configuration attribute in host.xml
  • Available in EAP 7, not in EAP 6
  • Description:
    Set to true to instruct the master Host Controller to automatically not forward configuration and operations for profiles, socket binding groups and server groups which do not affect our servers.
  • Usage:

    <domain-controller>
      <remote host="${jboss.test.host.master.address}" port="9999" security-realm="ManagementRealm" ignore-unused-configuration="true">
    </domain-controller>
    

• There is domain wide configuration host-exclude
  • Description:
    Configuration of resources that should be hidden by the Domain Controller from a slave Host Controller that is running a particular version.
  • Refer to https://issues.jboss.org/browse/WFCORE-1340 for detailed description
  • Default domain.xml already contains this configuration for EAP 6.2-6.4 and 6.4 CP stream
• Add example how to use a profile copied from an EAP6 domain.xml to manage EAP6 servers via an EAP 7 Domain Controller
  • Use last 3 public comments on https://issues.jboss.org/browse/JBEAP-2888 as guide

cc brian.stansberry